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_GRAPH_ADAPTOR_EXTENDER_H |
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20 | #define LEMON_BITS_GRAPH_ADAPTOR_EXTENDER_H |
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21 | |
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22 | #include <lemon/bits/invalid.h> |
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23 | #include <lemon/error.h> |
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24 | |
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25 | #include <lemon/bits/default_map.h> |
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26 | |
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27 | |
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28 | ///\ingroup graphbits |
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29 | ///\file |
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30 | ///\brief Extenders for the graph adaptor types |
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31 | namespace lemon { |
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32 | |
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33 | /// \ingroup graphbits |
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34 | /// |
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35 | /// \brief Extender for the GraphAdaptors |
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36 | template <typename _Graph> |
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37 | class GraphAdaptorExtender : public _Graph { |
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38 | public: |
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39 | |
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40 | typedef _Graph Parent; |
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41 | typedef _Graph Graph; |
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42 | typedef GraphAdaptorExtender Adaptor; |
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43 | |
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44 | // Base extensions |
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45 | |
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46 | typedef typename Parent::Node Node; |
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47 | typedef typename Parent::Edge Edge; |
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48 | |
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49 | int maxId(Node) const { |
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50 | return Parent::maxNodeId(); |
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51 | } |
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52 | |
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53 | int maxId(Edge) const { |
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54 | return Parent::maxEdgeId(); |
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55 | } |
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56 | |
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57 | Node fromId(int id, Node) const { |
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58 | return Parent::nodeFromId(id); |
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59 | } |
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60 | |
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61 | Edge fromId(int id, Edge) const { |
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62 | return Parent::edgeFromId(id); |
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63 | } |
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64 | |
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65 | Node oppositeNode(const Node &n, const Edge &e) const { |
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66 | if (n == Parent::source(e)) |
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67 | return Parent::target(e); |
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68 | else if(n==Parent::target(e)) |
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69 | return Parent::source(e); |
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70 | else |
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71 | return INVALID; |
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72 | } |
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73 | |
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74 | class NodeIt : public Node { |
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75 | const Adaptor* graph; |
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76 | public: |
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77 | |
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78 | NodeIt() {} |
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79 | |
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80 | NodeIt(Invalid i) : Node(i) { } |
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81 | |
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82 | explicit NodeIt(const Adaptor& _graph) : graph(&_graph) { |
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83 | _graph.first(static_cast<Node&>(*this)); |
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84 | } |
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85 | |
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86 | NodeIt(const Adaptor& _graph, const Node& node) |
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87 | : Node(node), graph(&_graph) {} |
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88 | |
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89 | NodeIt& operator++() { |
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90 | graph->next(*this); |
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91 | return *this; |
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92 | } |
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93 | |
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94 | }; |
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95 | |
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96 | |
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97 | class EdgeIt : public Edge { |
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98 | const Adaptor* graph; |
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99 | public: |
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100 | |
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101 | EdgeIt() { } |
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102 | |
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103 | EdgeIt(Invalid i) : Edge(i) { } |
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104 | |
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105 | explicit EdgeIt(const Adaptor& _graph) : graph(&_graph) { |
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106 | _graph.first(static_cast<Edge&>(*this)); |
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107 | } |
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108 | |
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109 | EdgeIt(const Adaptor& _graph, const Edge& e) : |
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110 | Edge(e), graph(&_graph) { } |
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111 | |
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112 | EdgeIt& operator++() { |
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113 | graph->next(*this); |
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114 | return *this; |
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115 | } |
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116 | |
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117 | }; |
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118 | |
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119 | |
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120 | class OutEdgeIt : public Edge { |
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121 | const Adaptor* graph; |
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122 | public: |
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123 | |
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124 | OutEdgeIt() { } |
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125 | |
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126 | OutEdgeIt(Invalid i) : Edge(i) { } |
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127 | |
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128 | OutEdgeIt(const Adaptor& _graph, const Node& node) |
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129 | : graph(&_graph) { |
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130 | _graph.firstOut(*this, node); |
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131 | } |
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132 | |
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133 | OutEdgeIt(const Adaptor& _graph, const Edge& edge) |
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134 | : Edge(edge), graph(&_graph) {} |
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135 | |
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136 | OutEdgeIt& operator++() { |
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137 | graph->nextOut(*this); |
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138 | return *this; |
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139 | } |
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140 | |
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141 | }; |
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142 | |
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143 | |
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144 | class InEdgeIt : public Edge { |
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145 | const Adaptor* graph; |
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146 | public: |
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147 | |
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148 | InEdgeIt() { } |
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149 | |
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150 | InEdgeIt(Invalid i) : Edge(i) { } |
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151 | |
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152 | InEdgeIt(const Adaptor& _graph, const Node& node) |
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153 | : graph(&_graph) { |
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154 | _graph.firstIn(*this, node); |
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155 | } |
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156 | |
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157 | InEdgeIt(const Adaptor& _graph, const Edge& edge) : |
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158 | Edge(edge), graph(&_graph) {} |
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159 | |
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160 | InEdgeIt& operator++() { |
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161 | graph->nextIn(*this); |
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162 | return *this; |
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163 | } |
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164 | |
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165 | }; |
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166 | |
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167 | /// \brief Base node of the iterator |
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168 | /// |
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169 | /// Returns the base node (ie. the source in this case) of the iterator |
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170 | Node baseNode(const OutEdgeIt &e) const { |
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171 | return Parent::source(e); |
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172 | } |
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173 | /// \brief Running node of the iterator |
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174 | /// |
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175 | /// Returns the running node (ie. the target in this case) of the |
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176 | /// iterator |
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177 | Node runningNode(const OutEdgeIt &e) const { |
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178 | return Parent::target(e); |
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179 | } |
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180 | |
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181 | /// \brief Base node of the iterator |
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182 | /// |
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183 | /// Returns the base node (ie. the target in this case) of the iterator |
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184 | Node baseNode(const InEdgeIt &e) const { |
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185 | return Parent::target(e); |
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186 | } |
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187 | /// \brief Running node of the iterator |
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188 | /// |
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189 | /// Returns the running node (ie. the source in this case) of the |
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190 | /// iterator |
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191 | Node runningNode(const InEdgeIt &e) const { |
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192 | return Parent::source(e); |
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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 | |
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198 | /// \ingroup graphbits |
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199 | /// |
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200 | /// \brief Extender for the UGraphAdaptors |
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201 | template <typename _UGraph> |
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202 | class UGraphAdaptorExtender : public _UGraph { |
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203 | public: |
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204 | |
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205 | typedef _UGraph Parent; |
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206 | typedef _UGraph UGraph; |
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207 | typedef UGraphAdaptorExtender Adaptor; |
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208 | |
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209 | typedef typename Parent::Node Node; |
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210 | typedef typename Parent::Edge Edge; |
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211 | typedef typename Parent::UEdge UEdge; |
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212 | |
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213 | // UGraph extension |
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214 | |
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215 | int maxId(Node) const { |
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216 | return Parent::maxNodeId(); |
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217 | } |
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218 | |
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219 | int maxId(Edge) const { |
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220 | return Parent::maxEdgeId(); |
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221 | } |
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222 | |
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223 | int maxId(UEdge) const { |
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224 | return Parent::maxUEdgeId(); |
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225 | } |
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226 | |
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227 | Node fromId(int id, Node) const { |
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228 | return Parent::nodeFromId(id); |
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229 | } |
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230 | |
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231 | Edge fromId(int id, Edge) const { |
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232 | return Parent::edgeFromId(id); |
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233 | } |
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234 | |
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235 | UEdge fromId(int id, UEdge) const { |
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236 | return Parent::uEdgeFromId(id); |
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237 | } |
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238 | |
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239 | Node oppositeNode(const Node &n, const UEdge &e) const { |
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240 | if( n == Parent::source(e)) |
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241 | return Parent::target(e); |
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242 | else if( n == Parent::target(e)) |
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243 | return Parent::source(e); |
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244 | else |
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245 | return INVALID; |
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246 | } |
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247 | |
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248 | Edge oppositeEdge(const Edge &e) const { |
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249 | return Parent::direct(e, !Parent::direction(e)); |
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250 | } |
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251 | |
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252 | using Parent::direct; |
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253 | Edge direct(const UEdge &ue, const Node &s) const { |
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254 | return Parent::direct(ue, Parent::source(ue) == s); |
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255 | } |
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256 | |
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257 | |
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258 | class NodeIt : public Node { |
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259 | const Adaptor* graph; |
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260 | public: |
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261 | |
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262 | NodeIt() {} |
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263 | |
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264 | NodeIt(Invalid i) : Node(i) { } |
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265 | |
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266 | explicit NodeIt(const Adaptor& _graph) : graph(&_graph) { |
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267 | _graph.first(static_cast<Node&>(*this)); |
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268 | } |
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269 | |
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270 | NodeIt(const Adaptor& _graph, const Node& node) |
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271 | : Node(node), graph(&_graph) {} |
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272 | |
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273 | NodeIt& operator++() { |
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274 | graph->next(*this); |
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275 | return *this; |
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276 | } |
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277 | |
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278 | }; |
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279 | |
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280 | |
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281 | class EdgeIt : public Edge { |
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282 | const Adaptor* graph; |
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283 | public: |
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284 | |
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285 | EdgeIt() { } |
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286 | |
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287 | EdgeIt(Invalid i) : Edge(i) { } |
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288 | |
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289 | explicit EdgeIt(const Adaptor& _graph) : graph(&_graph) { |
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290 | _graph.first(static_cast<Edge&>(*this)); |
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291 | } |
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292 | |
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293 | EdgeIt(const Adaptor& _graph, const Edge& e) : |
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294 | Edge(e), graph(&_graph) { } |
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295 | |
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296 | EdgeIt& operator++() { |
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297 | graph->next(*this); |
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298 | return *this; |
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299 | } |
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300 | |
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301 | }; |
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302 | |
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303 | |
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304 | class OutEdgeIt : public Edge { |
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305 | const Adaptor* graph; |
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306 | public: |
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307 | |
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308 | OutEdgeIt() { } |
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309 | |
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310 | OutEdgeIt(Invalid i) : Edge(i) { } |
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311 | |
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312 | OutEdgeIt(const Adaptor& _graph, const Node& node) |
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313 | : graph(&_graph) { |
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314 | _graph.firstOut(*this, node); |
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315 | } |
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316 | |
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317 | OutEdgeIt(const Adaptor& _graph, const Edge& edge) |
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318 | : Edge(edge), graph(&_graph) {} |
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319 | |
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320 | OutEdgeIt& operator++() { |
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321 | graph->nextOut(*this); |
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322 | return *this; |
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323 | } |
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324 | |
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325 | }; |
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326 | |
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327 | |
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328 | class InEdgeIt : public Edge { |
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329 | const Adaptor* graph; |
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330 | public: |
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331 | |
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332 | InEdgeIt() { } |
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333 | |
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334 | InEdgeIt(Invalid i) : Edge(i) { } |
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335 | |
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336 | InEdgeIt(const Adaptor& _graph, const Node& node) |
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337 | : graph(&_graph) { |
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338 | _graph.firstIn(*this, node); |
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339 | } |
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340 | |
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341 | InEdgeIt(const Adaptor& _graph, const Edge& edge) : |
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342 | Edge(edge), graph(&_graph) {} |
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343 | |
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344 | InEdgeIt& operator++() { |
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345 | graph->nextIn(*this); |
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346 | return *this; |
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347 | } |
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348 | |
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349 | }; |
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350 | |
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351 | class UEdgeIt : public Parent::UEdge { |
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352 | const Adaptor* graph; |
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353 | public: |
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354 | |
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355 | UEdgeIt() { } |
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356 | |
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357 | UEdgeIt(Invalid i) : UEdge(i) { } |
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358 | |
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359 | explicit UEdgeIt(const Adaptor& _graph) : graph(&_graph) { |
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360 | _graph.first(static_cast<UEdge&>(*this)); |
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361 | } |
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362 | |
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363 | UEdgeIt(const Adaptor& _graph, const UEdge& e) : |
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364 | UEdge(e), graph(&_graph) { } |
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365 | |
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366 | UEdgeIt& operator++() { |
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367 | graph->next(*this); |
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368 | return *this; |
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369 | } |
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370 | |
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371 | }; |
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372 | |
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373 | class IncEdgeIt : public Parent::UEdge { |
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374 | friend class UGraphAdaptorExtender; |
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375 | const Adaptor* graph; |
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376 | bool direction; |
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377 | public: |
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378 | |
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379 | IncEdgeIt() { } |
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380 | |
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381 | IncEdgeIt(Invalid i) : UEdge(i), direction(false) { } |
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382 | |
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383 | IncEdgeIt(const Adaptor& _graph, const Node &n) : graph(&_graph) { |
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384 | _graph.firstInc(static_cast<UEdge&>(*this), direction, n); |
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385 | } |
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386 | |
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387 | IncEdgeIt(const Adaptor& _graph, const UEdge &ue, const Node &n) |
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388 | : graph(&_graph), UEdge(ue) { |
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389 | direction = (_graph.source(ue) == n); |
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390 | } |
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391 | |
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392 | IncEdgeIt& operator++() { |
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393 | graph->nextInc(*this, direction); |
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394 | return *this; |
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395 | } |
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396 | }; |
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397 | |
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398 | /// \brief Base node of the iterator |
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399 | /// |
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400 | /// Returns the base node (ie. the source in this case) of the iterator |
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401 | Node baseNode(const OutEdgeIt &e) const { |
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402 | return Parent::source(static_cast<const Edge&>(e)); |
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403 | } |
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404 | /// \brief Running node of the iterator |
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405 | /// |
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406 | /// Returns the running node (ie. the target in this case) of the |
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407 | /// iterator |
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408 | Node runningNode(const OutEdgeIt &e) const { |
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409 | return Parent::target(static_cast<const Edge&>(e)); |
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410 | } |
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411 | |
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412 | /// \brief Base node of the iterator |
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413 | /// |
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414 | /// Returns the base node (ie. the target in this case) of the iterator |
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415 | Node baseNode(const InEdgeIt &e) const { |
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416 | return Parent::target(static_cast<const Edge&>(e)); |
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417 | } |
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418 | /// \brief Running node of the iterator |
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419 | /// |
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420 | /// Returns the running node (ie. the source in this case) of the |
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421 | /// iterator |
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422 | Node runningNode(const InEdgeIt &e) const { |
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423 | return Parent::source(static_cast<const Edge&>(e)); |
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424 | } |
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425 | |
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426 | /// Base node of the iterator |
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427 | /// |
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428 | /// Returns the base node of the iterator |
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429 | Node baseNode(const IncEdgeIt &e) const { |
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430 | return e.direction ? source(e) : target(e); |
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431 | } |
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432 | /// Running node of the iterator |
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433 | /// |
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434 | /// Returns the running node of the iterator |
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435 | Node runningNode(const IncEdgeIt &e) const { |
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436 | return e.direction ? target(e) : source(e); |
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437 | } |
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438 | |
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439 | }; |
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440 | |
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441 | /// \ingroup graphbits |
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442 | /// |
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443 | /// \brief Extender for the BpUGraphAdaptors |
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444 | template <typename Base> |
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445 | class BpUGraphAdaptorExtender : public Base { |
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446 | public: |
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447 | typedef Base Parent; |
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448 | typedef BpUGraphAdaptorExtender Graph; |
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449 | |
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450 | typedef typename Parent::Node Node; |
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451 | typedef typename Parent::BNode BNode; |
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452 | typedef typename Parent::ANode ANode; |
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453 | typedef typename Parent::Edge Edge; |
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454 | typedef typename Parent::UEdge UEdge; |
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455 | |
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456 | |
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457 | int maxId(Node) const { |
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458 | return Parent::maxNodeId(); |
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459 | } |
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460 | int maxId(BNode) const { |
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461 | return Parent::maxBNodeId(); |
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462 | } |
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463 | int maxId(ANode) const { |
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464 | return Parent::maxANodeId(); |
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465 | } |
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466 | int maxId(Edge) const { |
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467 | return Parent::maxEdgeId(); |
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468 | } |
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469 | int maxId(UEdge) const { |
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470 | return Parent::maxUEdgeId(); |
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471 | } |
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472 | |
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473 | |
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474 | Node fromId(int id, Node) const { |
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475 | return Parent::nodeFromId(id); |
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476 | } |
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477 | ANode fromId(int id, ANode) const { |
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478 | return Parent::nodeFromANodeId(id); |
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479 | } |
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480 | BNode fromId(int id, BNode) const { |
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481 | return Parent::nodeFromBNodeId(id); |
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482 | } |
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483 | Edge fromId(int id, Edge) const { |
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484 | return Parent::edgeFromId(id); |
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485 | } |
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486 | UEdge fromId(int id, UEdge) const { |
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487 | return Parent::uEdgeFromId(id); |
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488 | } |
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489 | |
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490 | class NodeIt : public Node { |
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491 | const Graph* graph; |
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492 | public: |
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493 | |
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494 | NodeIt() { } |
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495 | |
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496 | NodeIt(Invalid i) : Node(INVALID) { } |
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497 | |
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498 | explicit NodeIt(const Graph& _graph) : graph(&_graph) { |
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499 | graph->first(static_cast<Node&>(*this)); |
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500 | } |
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501 | |
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502 | NodeIt(const Graph& _graph, const Node& node) |
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503 | : Node(node), graph(&_graph) { } |
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504 | |
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505 | NodeIt& operator++() { |
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506 | graph->next(*this); |
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507 | return *this; |
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508 | } |
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509 | |
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510 | }; |
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511 | |
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512 | class ANodeIt : public Node { |
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513 | friend class BpUGraphAdaptorExtender; |
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514 | const Graph* graph; |
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515 | public: |
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516 | |
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517 | ANodeIt() { } |
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518 | |
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519 | ANodeIt(Invalid i) : Node(INVALID) { } |
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520 | |
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521 | explicit ANodeIt(const Graph& _graph) : graph(&_graph) { |
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522 | graph->firstANode(static_cast<Node&>(*this)); |
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523 | } |
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524 | |
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525 | ANodeIt(const Graph& _graph, const Node& node) |
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526 | : Node(node), graph(&_graph) {} |
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527 | |
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528 | ANodeIt& operator++() { |
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529 | graph->nextANode(*this); |
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530 | return *this; |
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531 | } |
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532 | }; |
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533 | |
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534 | class BNodeIt : public Node { |
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535 | friend class BpUGraphAdaptorExtender; |
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536 | const Graph* graph; |
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537 | public: |
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538 | |
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539 | BNodeIt() { } |
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540 | |
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541 | BNodeIt(Invalid i) : Node(INVALID) { } |
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542 | |
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543 | explicit BNodeIt(const Graph& _graph) : graph(&_graph) { |
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544 | graph->firstBNode(static_cast<Node&>(*this)); |
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545 | } |
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546 | |
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547 | BNodeIt(const Graph& _graph, const Node& node) |
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548 | : Node(node), graph(&_graph) {} |
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549 | |
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550 | BNodeIt& operator++() { |
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551 | graph->nextBNode(*this); |
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552 | return *this; |
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553 | } |
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554 | }; |
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555 | |
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556 | class EdgeIt : public Edge { |
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557 | friend class BpUGraphAdaptorExtender; |
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558 | const Graph* graph; |
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559 | public: |
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560 | |
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561 | EdgeIt() { } |
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562 | |
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563 | EdgeIt(Invalid i) : Edge(INVALID) { } |
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564 | |
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565 | explicit EdgeIt(const Graph& _graph) : graph(&_graph) { |
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566 | graph->first(static_cast<Edge&>(*this)); |
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567 | } |
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568 | |
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569 | EdgeIt(const Graph& _graph, const Edge& edge) |
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570 | : Edge(edge), graph(&_graph) { } |
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571 | |
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572 | EdgeIt& operator++() { |
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573 | graph->next(*this); |
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574 | return *this; |
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575 | } |
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576 | |
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577 | }; |
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578 | |
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579 | class UEdgeIt : public UEdge { |
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580 | friend class BpUGraphAdaptorExtender; |
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581 | const Graph* graph; |
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582 | public: |
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583 | |
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584 | UEdgeIt() { } |
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585 | |
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586 | UEdgeIt(Invalid i) : UEdge(INVALID) { } |
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587 | |
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588 | explicit UEdgeIt(const Graph& _graph) : graph(&_graph) { |
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589 | graph->first(static_cast<UEdge&>(*this)); |
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590 | } |
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591 | |
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592 | UEdgeIt(const Graph& _graph, const UEdge& edge) |
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593 | : UEdge(edge), graph(&_graph) { } |
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594 | |
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595 | UEdgeIt& operator++() { |
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596 | graph->next(*this); |
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597 | return *this; |
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598 | } |
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599 | }; |
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600 | |
---|
601 | class OutEdgeIt : public Edge { |
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602 | friend class BpUGraphAdaptorExtender; |
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603 | const Graph* graph; |
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604 | public: |
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605 | |
---|
606 | OutEdgeIt() { } |
---|
607 | |
---|
608 | OutEdgeIt(Invalid i) : Edge(i) { } |
---|
609 | |
---|
610 | OutEdgeIt(const Graph& _graph, const Node& node) |
---|
611 | : graph(&_graph) { |
---|
612 | graph->firstOut(*this, node); |
---|
613 | } |
---|
614 | |
---|
615 | OutEdgeIt(const Graph& _graph, const Edge& edge) |
---|
616 | : Edge(edge), graph(&_graph) {} |
---|
617 | |
---|
618 | OutEdgeIt& operator++() { |
---|
619 | graph->nextOut(*this); |
---|
620 | return *this; |
---|
621 | } |
---|
622 | |
---|
623 | }; |
---|
624 | |
---|
625 | |
---|
626 | class InEdgeIt : public Edge { |
---|
627 | friend class BpUGraphAdaptorExtender; |
---|
628 | const Graph* graph; |
---|
629 | public: |
---|
630 | |
---|
631 | InEdgeIt() { } |
---|
632 | |
---|
633 | InEdgeIt(Invalid i) : Edge(i) { } |
---|
634 | |
---|
635 | InEdgeIt(const Graph& _graph, const Node& node) |
---|
636 | : graph(&_graph) { |
---|
637 | graph->firstIn(*this, node); |
---|
638 | } |
---|
639 | |
---|
640 | InEdgeIt(const Graph& _graph, const Edge& edge) : |
---|
641 | Edge(edge), graph(&_graph) {} |
---|
642 | |
---|
643 | InEdgeIt& operator++() { |
---|
644 | graph->nextIn(*this); |
---|
645 | return *this; |
---|
646 | } |
---|
647 | |
---|
648 | }; |
---|
649 | |
---|
650 | /// \brief Base node of the iterator |
---|
651 | /// |
---|
652 | /// Returns the base node (ie. the source in this case) of the iterator |
---|
653 | Node baseNode(const OutEdgeIt &e) const { |
---|
654 | return Parent::source(static_cast<const Edge&>(e)); |
---|
655 | } |
---|
656 | /// \brief Running node of the iterator |
---|
657 | /// |
---|
658 | /// Returns the running node (ie. the target in this case) of the |
---|
659 | /// iterator |
---|
660 | Node runningNode(const OutEdgeIt &e) const { |
---|
661 | return Parent::target(static_cast<const Edge&>(e)); |
---|
662 | } |
---|
663 | |
---|
664 | /// \brief Base node of the iterator |
---|
665 | /// |
---|
666 | /// Returns the base node (ie. the target in this case) of the iterator |
---|
667 | Node baseNode(const InEdgeIt &e) const { |
---|
668 | return Parent::target(static_cast<const Edge&>(e)); |
---|
669 | } |
---|
670 | /// \brief Running node of the iterator |
---|
671 | /// |
---|
672 | /// Returns the running node (ie. the source in this case) of the |
---|
673 | /// iterator |
---|
674 | Node runningNode(const InEdgeIt &e) const { |
---|
675 | return Parent::source(static_cast<const Edge&>(e)); |
---|
676 | } |
---|
677 | |
---|
678 | class IncEdgeIt : public Parent::UEdge { |
---|
679 | friend class BpUGraphAdaptorExtender; |
---|
680 | const Graph* graph; |
---|
681 | bool direction; |
---|
682 | public: |
---|
683 | |
---|
684 | IncEdgeIt() { } |
---|
685 | |
---|
686 | IncEdgeIt(Invalid i) : UEdge(i), direction(true) { } |
---|
687 | |
---|
688 | IncEdgeIt(const Graph& _graph, const Node &n) : graph(&_graph) { |
---|
689 | graph->firstInc(*this, direction, n); |
---|
690 | } |
---|
691 | |
---|
692 | IncEdgeIt(const Graph& _graph, const UEdge &ue, const Node &n) |
---|
693 | : graph(&_graph), UEdge(ue) { |
---|
694 | direction = (graph->source(ue) == n); |
---|
695 | } |
---|
696 | |
---|
697 | IncEdgeIt& operator++() { |
---|
698 | graph->nextInc(*this, direction); |
---|
699 | return *this; |
---|
700 | } |
---|
701 | }; |
---|
702 | |
---|
703 | |
---|
704 | /// Base node of the iterator |
---|
705 | /// |
---|
706 | /// Returns the base node of the iterator |
---|
707 | Node baseNode(const IncEdgeIt &e) const { |
---|
708 | return e.direction ? source(e) : target(e); |
---|
709 | } |
---|
710 | |
---|
711 | /// Running node of the iterator |
---|
712 | /// |
---|
713 | /// Returns the running node of the iterator |
---|
714 | Node runningNode(const IncEdgeIt &e) const { |
---|
715 | return e.direction ? target(e) : source(e); |
---|
716 | } |
---|
717 | |
---|
718 | Node oppositeNode(const Node &n, const UEdge &e) const { |
---|
719 | if( n == Parent::source(e)) |
---|
720 | return Parent::target(e); |
---|
721 | else if( n == Parent::target(e)) |
---|
722 | return Parent::source(e); |
---|
723 | else |
---|
724 | return INVALID; |
---|
725 | } |
---|
726 | |
---|
727 | Edge oppositeEdge(const Edge &e) const { |
---|
728 | return Parent::direct(e, !Parent::direction(e)); |
---|
729 | } |
---|
730 | |
---|
731 | using Parent::direct; |
---|
732 | Edge direct(const UEdge &ue, const Node &s) const { |
---|
733 | return Parent::direct(ue, Parent::source(ue) == s); |
---|
734 | } |
---|
735 | |
---|
736 | }; |
---|
737 | |
---|
738 | |
---|
739 | } |
---|
740 | |
---|
741 | |
---|
742 | #endif |
---|