1 | // -*- c++ -*- |
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2 | #ifndef LEMON_NET_GRAPH_H |
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3 | #define LEMON_NET_GRAPH_H |
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4 | |
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5 | ///\file |
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6 | ///\brief Declaration of HierarchyGraph. |
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7 | |
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8 | #include <lemon/invalid.h> |
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9 | #include <lemon/maps.h> |
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10 | |
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11 | /// The namespace of LEMON |
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12 | namespace lemon |
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13 | { |
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14 | |
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15 | // @defgroup empty_graph The HierarchyGraph class |
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16 | // @{ |
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17 | |
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18 | /// A graph class in that a simple edge can represent a path. |
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19 | |
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20 | /// This class provides common features of a graph structure |
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21 | /// that represents a network. You can handle with it layers. This |
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22 | /// means that a node in one layer can be a complete network in a nother |
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23 | /// layer. |
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24 | |
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25 | template < class Gact, class Gsub > class HierarchyGraph |
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26 | { |
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27 | |
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28 | public: |
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29 | |
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30 | /// The actual layer |
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31 | Gact actuallayer; |
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32 | |
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33 | |
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34 | /// Map of the subnetworks in the sublayer |
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35 | /// The appropriate edge nodes are also stored here |
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36 | |
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37 | class SubNetwork |
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38 | { |
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39 | |
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40 | struct actedgesubnodestruct |
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41 | { |
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42 | typename Gact::Edge actedge; |
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43 | typename Gsub::Node subnode; |
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44 | }; |
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45 | |
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46 | int edgenumber; |
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47 | bool connectable; |
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48 | Gact *actuallayer; |
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49 | typename Gact::Node * actuallayernode; |
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50 | Gsub *subnetwork; |
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51 | actedgesubnodestruct *assignments; |
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52 | |
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53 | public: |
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54 | |
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55 | int addAssignment (typename Gact::Edge actedge, |
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56 | typename Gsub::Node subnode) |
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57 | { |
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58 | if (!(actuallayer->valid (actedge))) |
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59 | { |
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60 | cerr << "The given edge is not in the given network!" << endl; |
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61 | return -1; |
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62 | } |
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63 | else if ((actuallayer->id (actuallayer->source (actedge)) != |
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64 | actuallayer->id (*actuallayernode)) |
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65 | && (actuallayer->id (actuallayer->target (actedge)) != |
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66 | actuallayer->id (*actuallayernode))) |
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67 | { |
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68 | cerr << "The given edge does not connect to the given node!" << |
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69 | endl; |
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70 | return -1; |
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71 | } |
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72 | |
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73 | if (!(subnetwork->valid (subnode))) |
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74 | { |
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75 | cerr << "The given node is not in the given network!" << endl; |
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76 | return -1; |
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77 | } |
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78 | |
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79 | int i = 0; |
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80 | //while in the array there is valid note that is not equvivalent with the one that would be noted increase i |
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81 | while ((i < edgenumber) |
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82 | && (actuallayer->valid (assignments[i].actedge)) |
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83 | && (assignments[i].actedge != actedge)) |
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84 | i++; |
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85 | if (assignments[i].actedge == actedge) |
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86 | { |
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87 | cout << "Warning: Redefinement of assigment!!!" << endl; |
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88 | } |
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89 | if (i == edgenumber) |
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90 | { |
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91 | cout << |
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92 | "This case can't be!!! (because there should be the guven edge in the array already and the cycle had to stop)" |
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93 | << endl; |
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94 | } |
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95 | //if(!(actuallayer->valid(assignments[i].actedge))) //this condition is necessary if we do not obey redefinition |
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96 | { |
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97 | assignments[i].actedge = actedge; |
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98 | assignments[i].subnode = subnode; |
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99 | } |
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100 | |
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101 | /// If to all of the edges a subnode is assigned then the subnetwork is connectable (attachable?) |
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102 | /// We do not need to check for further attributes, because to notice an assignment we need |
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103 | /// all of them to be correctly initialised before. |
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104 | if (i == edgenumber - 1) |
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105 | connectable = 1; |
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106 | |
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107 | return 0; |
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108 | } |
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109 | |
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110 | int setSubNetwork (Gsub * sn) |
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111 | { |
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112 | subnetwork = sn; |
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113 | return 0; |
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114 | } |
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115 | |
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116 | int setActualLayer (Gact * al) |
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117 | { |
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118 | actuallayer = al; |
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119 | return 0; |
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120 | } |
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121 | |
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122 | int setActualLayerNode (typename Gact::Node * aln) |
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123 | { |
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124 | typename Gact::InEdgeIt iei; |
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125 | typename Gact::OutEdgeIt oei; |
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126 | |
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127 | actuallayernode = aln; |
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128 | |
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129 | edgenumber = 0; |
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130 | |
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131 | if (actuallayer) |
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132 | { |
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133 | for (iei = actuallayer->first (iei, (*actuallayernode)); |
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134 | ((actuallayer->valid (iei)) |
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135 | && (actuallayer->target (iei) == (*actuallayernode))); |
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136 | actuallayer->next (iei)) |
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137 | { |
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138 | cout << actuallayer->id (actuallayer-> |
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139 | source (iei)) << " " << actuallayer-> |
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140 | id (actuallayer->target (iei)) << endl; |
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141 | edgenumber++; |
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142 | } |
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143 | //cout << "Number of in-edges: " << edgenumber << endl; |
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144 | for (oei = actuallayer->first (oei, (*actuallayernode)); |
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145 | ((actuallayer->valid (oei)) |
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146 | && (actuallayer->source (oei) == (*actuallayernode))); |
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147 | actuallayer->next (oei)) |
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148 | { |
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149 | cout << actuallayer->id (actuallayer-> |
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150 | source (oei)) << " " << actuallayer-> |
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151 | id (actuallayer->target (oei)) << endl; |
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152 | edgenumber++; |
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153 | } |
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154 | //cout << "Number of in+out-edges: " << edgenumber << endl; |
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155 | assignments = new actedgesubnodestruct[edgenumber]; |
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156 | for (int i = 0; i < edgenumber; i++) |
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157 | { |
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158 | assignments[i].actedge = INVALID; |
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159 | assignments[i].subnode = INVALID; |
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160 | } |
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161 | } |
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162 | else |
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163 | { |
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164 | cerr << "There is no actual layer defined yet!" << endl; |
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165 | return -1; |
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166 | } |
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167 | |
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168 | return 0; |
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169 | } |
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170 | |
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171 | SubNetwork ():edgenumber (0), connectable (false), actuallayer (NULL), |
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172 | actuallayernode (NULL), subnetwork (NULL), |
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173 | assignments (NULL) |
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174 | { |
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175 | } |
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176 | |
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177 | }; |
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178 | |
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179 | typename Gact::template NodeMap < SubNetwork > subnetworks; |
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180 | |
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181 | |
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182 | /// Defalult constructor. |
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183 | /// We don't need any extra lines, because the actuallayer |
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184 | /// variable has run its constructor, when we have created this class |
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185 | /// So only the two maps has to be initialised here. |
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186 | HierarchyGraph ():subnetworks (actuallayer) |
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187 | { |
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188 | } |
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189 | |
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190 | |
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191 | ///Copy consructor. |
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192 | HierarchyGraph (const HierarchyGraph < Gact, Gsub > &HG):actuallayer (HG.actuallayer), |
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193 | subnetworks |
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194 | (actuallayer) |
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195 | { |
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196 | } |
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197 | |
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198 | |
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199 | /// The base type of the node iterators. |
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200 | |
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201 | /// This is the base type of each node iterators, |
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202 | /// thus each kind of node iterator will convert to this. |
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203 | /// The Node type of the HierarchyGraph is the Node type of the actual layer. |
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204 | typedef typename Gact::Node Node; |
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205 | |
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206 | |
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207 | /// This iterator goes through each node. |
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208 | |
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209 | /// Its usage is quite simple, for example you can count the number |
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210 | /// of nodes in graph \c G of type \c Graph like this: |
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211 | /// \code |
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212 | ///int count=0; |
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213 | ///for(Graph::NodeIt n(G);G.valid(n);G.next(n)) count++; |
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214 | /// \endcode |
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215 | /// The NodeIt type of the HierarchyGraph is the NodeIt type of the actual layer. |
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216 | typedef typename Gact::NodeIt NodeIt; |
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217 | |
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218 | |
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219 | /// The base type of the edge iterators. |
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220 | /// The Edge type of the HierarchyGraph is the Edge type of the actual layer. |
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221 | typedef typename Gact::Edge Edge; |
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222 | |
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223 | |
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224 | /// This iterator goes trough the outgoing edges of a node. |
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225 | |
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226 | /// This iterator goes trough the \e outgoing edges of a certain node |
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227 | /// of a graph. |
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228 | /// Its usage is quite simple, for example you can count the number |
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229 | /// of outgoing edges of a node \c n |
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230 | /// in graph \c G of type \c Graph as follows. |
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231 | /// \code |
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232 | ///int count=0; |
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233 | ///for(Graph::OutEdgeIt e(G,n);G.valid(e);G.next(e)) count++; |
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234 | /// \endcode |
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235 | /// The OutEdgeIt type of the HierarchyGraph is the OutEdgeIt type of the actual layer. |
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236 | typedef typename Gact::OutEdgeIt OutEdgeIt; |
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237 | |
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238 | |
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239 | /// This iterator goes trough the incoming edges of a node. |
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240 | |
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241 | /// This iterator goes trough the \e incoming edges of a certain node |
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242 | /// of a graph. |
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243 | /// Its usage is quite simple, for example you can count the number |
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244 | /// of outgoing edges of a node \c n |
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245 | /// in graph \c G of type \c Graph as follows. |
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246 | /// \code |
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247 | ///int count=0; |
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248 | ///for(Graph::InEdgeIt e(G,n);G.valid(e);G.next(e)) count++; |
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249 | /// \endcode |
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250 | /// The InEdgeIt type of the HierarchyGraph is the InEdgeIt type of the actual layer. |
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251 | typedef typename Gact::InEdgeIt InEdgeIt; |
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252 | |
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253 | |
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254 | /// This iterator goes through each edge. |
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255 | |
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256 | /// This iterator goes through each edge of a graph. |
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257 | /// Its usage is quite simple, for example you can count the number |
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258 | /// of edges in a graph \c G of type \c Graph as follows: |
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259 | /// \code |
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260 | ///int count=0; |
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261 | ///for(Graph::EdgeIt e(G);G.valid(e);G.next(e)) count++; |
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262 | /// \endcode |
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263 | /// The EdgeIt type of the HierarchyGraph is the EdgeIt type of the actual layer. |
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264 | typedef typename Gact::EdgeIt EdgeIt; |
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265 | |
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266 | |
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267 | /// First node of the graph. |
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268 | |
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269 | /// \retval i the first node. |
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270 | /// \return the first node. |
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271 | typename Gact::NodeIt & first (typename Gact::NodeIt & i) const |
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272 | { |
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273 | return actuallayer.first (i); |
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274 | } |
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275 | |
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276 | |
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277 | /// The first incoming edge. |
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278 | typename Gact::InEdgeIt & first (typename Gact::InEdgeIt & i, |
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279 | typename Gact::Node) const |
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280 | { |
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281 | return actuallayer.first (i); |
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282 | } |
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283 | |
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284 | |
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285 | /// The first outgoing edge. |
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286 | typename Gact::OutEdgeIt & first (typename Gact::OutEdgeIt & i, |
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287 | typename Gact::Node) const |
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288 | { |
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289 | return actuallayer.first (i); |
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290 | } |
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291 | |
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292 | |
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293 | // SymEdgeIt &first(SymEdgeIt &, Node) const { return i;} |
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294 | /// The first edge of the Graph. |
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295 | typename Gact::EdgeIt & first (typename Gact::EdgeIt & i) const |
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296 | { |
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297 | return actuallayer.first (i); |
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298 | } |
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299 | |
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300 | |
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301 | // Node getNext(Node) const {} |
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302 | // InEdgeIt getNext(InEdgeIt) const {} |
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303 | // OutEdgeIt getNext(OutEdgeIt) const {} |
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304 | // //SymEdgeIt getNext(SymEdgeIt) const {} |
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305 | // EdgeIt getNext(EdgeIt) const {} |
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306 | |
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307 | |
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308 | /// Go to the next node. |
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309 | typename Gact::NodeIt & next (typename Gact::NodeIt & i) const |
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310 | { |
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311 | return actuallayer.next (i); |
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312 | } |
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313 | /// Go to the next incoming edge. |
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314 | typename Gact::InEdgeIt & next (typename Gact::InEdgeIt & i) const |
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315 | { |
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316 | return actuallayer.next (i); |
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317 | } |
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318 | /// Go to the next outgoing edge. |
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319 | typename Gact::OutEdgeIt & next (typename Gact::OutEdgeIt & i) const |
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320 | { |
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321 | return actuallayer.next (i); |
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322 | } |
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323 | //SymEdgeIt &next(SymEdgeIt &) const {} |
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324 | /// Go to the next edge. |
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325 | typename Gact::EdgeIt & next (typename Gact::EdgeIt & i) const |
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326 | { |
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327 | return actuallayer.next (i); |
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328 | } |
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329 | |
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330 | ///Gives back the target node of an edge. |
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331 | typename Gact::Node target (typename Gact::Edge edge) const |
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332 | { |
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333 | return actuallayer.target (edge); |
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334 | } |
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335 | ///Gives back the source node of an edge. |
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336 | typename Gact::Node source (typename Gact::Edge edge) const |
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337 | { |
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338 | return actuallayer.source (edge); |
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339 | } |
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340 | |
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341 | // Node aNode(InEdgeIt) const {} |
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342 | // Node aNode(OutEdgeIt) const {} |
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343 | // Node aNode(SymEdgeIt) const {} |
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344 | |
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345 | // Node bNode(InEdgeIt) const {} |
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346 | // Node bNode(OutEdgeIt) const {} |
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347 | // Node bNode(SymEdgeIt) const {} |
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348 | |
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349 | /// Checks if a node iterator is valid |
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350 | |
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351 | ///\todo Maybe, it would be better if iterator converted to |
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352 | ///bool directly, as Jacint prefers. |
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353 | bool valid (const typename Gact::Node & node) const |
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354 | { |
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355 | return actuallayer.valid (node); |
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356 | } |
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357 | /// Checks if an edge iterator is valid |
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358 | |
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359 | ///\todo Maybe, it would be better if iterator converted to |
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360 | ///bool directly, as Jacint prefers. |
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361 | bool valid (const typename Gact::Edge & edge) const |
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362 | { |
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363 | return actuallayer.valid (edge); |
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364 | } |
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365 | |
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366 | ///Gives back the \e id of a node. |
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367 | |
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368 | ///\warning Not all graph structures provide this feature. |
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369 | /// |
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370 | int id (const typename Gact::Node & node) const |
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371 | { |
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372 | return actuallayer.id (node); |
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373 | } |
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374 | ///Gives back the \e id of an edge. |
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375 | |
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376 | ///\warning Not all graph structures provide this feature. |
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377 | /// |
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378 | int id (const typename Gact::Edge & edge) const |
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379 | { |
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380 | return actuallayer.id (edge); |
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381 | } |
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382 | |
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383 | //void setInvalid(Node &) const {}; |
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384 | //void setInvalid(Edge &) const {}; |
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385 | |
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386 | ///Add a new node to the graph. |
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387 | |
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388 | /// \return the new node. |
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389 | /// |
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390 | typename Gact::Node addNode () |
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391 | { |
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392 | return actuallayer.addNode (); |
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393 | } |
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394 | ///Add a new edge to the graph. |
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395 | |
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396 | ///Add a new edge to the graph with source node \c source |
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397 | ///and target node \c target. |
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398 | ///\return the new edge. |
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399 | typename Gact::Edge addEdge (typename Gact::Node node1, |
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400 | typename Gact::Node node2) |
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401 | { |
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402 | return actuallayer.addEdge (node1, node2); |
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403 | } |
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404 | |
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405 | /// Resets the graph. |
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406 | |
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407 | /// This function deletes all edges and nodes of the graph. |
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408 | /// It also frees the memory allocated to store them. |
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409 | void clear () |
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410 | { |
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411 | actuallayer.clear (); |
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412 | } |
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413 | |
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414 | int nodeNum () const |
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415 | { |
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416 | return actuallayer.nodeNum (); |
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417 | } |
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418 | int edgeNum () const |
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419 | { |
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420 | return actuallayer.edgeNum (); |
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421 | } |
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422 | |
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423 | ///Read/write/reference map of the nodes to type \c T. |
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424 | |
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425 | ///Read/write/reference map of the nodes to type \c T. |
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426 | /// \sa MemoryMap |
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427 | /// \todo We may need copy constructor |
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428 | /// \todo We may need conversion from other nodetype |
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429 | /// \todo We may need operator= |
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430 | /// \warning Making maps that can handle bool type (NodeMap<bool>) |
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431 | /// needs extra attention! |
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432 | |
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433 | template < class T > class NodeMap |
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434 | { |
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435 | public: |
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436 | typedef T Value; |
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437 | typedef Node Key; |
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438 | |
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439 | NodeMap (const HierarchyGraph &) |
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440 | { |
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441 | } |
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442 | NodeMap (const HierarchyGraph &, T) |
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443 | { |
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444 | } |
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445 | |
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446 | template < typename TT > NodeMap (const NodeMap < TT > &) |
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447 | { |
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448 | } |
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449 | |
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450 | /// Sets the value of a node. |
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451 | |
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452 | /// Sets the value associated with node \c i to the value \c t. |
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453 | /// |
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454 | void set (Node, T) |
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455 | { |
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456 | } |
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457 | // Gets the value of a node. |
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458 | //T get(Node i) const {return *(T*)0;} //FIXME: Is it necessary? |
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459 | T & operator[](Node) |
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460 | { |
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461 | return *(T *) 0; |
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462 | } |
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463 | const T & operator[] (Node) const |
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464 | { |
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465 | return *(T *) 0; |
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466 | } |
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467 | |
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468 | /// Updates the map if the graph has been changed |
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469 | |
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470 | /// \todo Do we need this? |
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471 | /// |
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472 | void update () |
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473 | { |
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474 | } |
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475 | void update (T a) |
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476 | { |
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477 | } //FIXME: Is it necessary |
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478 | }; |
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479 | |
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480 | ///Read/write/reference map of the edges to type \c T. |
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481 | |
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482 | ///Read/write/reference map of the edges to type \c T. |
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483 | ///It behaves exactly in the same way as \ref NodeMap. |
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484 | /// \sa NodeMap |
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485 | /// \sa MemoryMap |
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486 | /// \todo We may need copy constructor |
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487 | /// \todo We may need conversion from other edgetype |
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488 | /// \todo We may need operator= |
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489 | template < class T > class EdgeMap |
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490 | { |
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491 | public: |
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492 | typedef T Value; |
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493 | typedef Edge Key; |
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494 | |
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495 | EdgeMap (const HierarchyGraph &) |
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496 | { |
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497 | } |
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498 | EdgeMap (const HierarchyGraph &, T) |
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499 | { |
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500 | } |
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501 | |
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502 | ///\todo It can copy between different types. |
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503 | /// |
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504 | template < typename TT > EdgeMap (const EdgeMap < TT > &) |
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505 | { |
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506 | } |
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507 | |
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508 | void set (Edge, T) |
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509 | { |
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510 | } |
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511 | //T get(Edge) const {return *(T*)0;} |
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512 | T & operator[](Edge) |
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513 | { |
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514 | return *(T *) 0; |
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515 | } |
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516 | const T & operator[] (Edge) const |
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517 | { |
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518 | return *(T *) 0; |
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519 | } |
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520 | |
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521 | void update () |
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522 | { |
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523 | } |
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524 | void update (T a) |
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525 | { |
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526 | } //FIXME: Is it necessary |
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527 | }; |
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528 | }; |
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529 | |
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530 | /// An empty erasable graph class. |
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531 | |
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532 | /// This class provides all the common features of an \e erasable graph |
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533 | /// structure, |
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534 | /// however completely without implementations and real data structures |
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535 | /// behind the interface. |
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536 | /// All graph algorithms should compile with this class, but it will not |
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537 | /// run properly, of course. |
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538 | /// |
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539 | /// \todo This blabla could be replaced by a sepatate description about |
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540 | /// s. |
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541 | /// |
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542 | /// It can be used for checking the interface compatibility, |
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543 | /// or it can serve as a skeleton of a new graph structure. |
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544 | /// |
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545 | /// Also, you will find here the full documentation of a certain graph |
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546 | /// feature, the documentation of a real graph imlementation |
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547 | /// like @ref ListGraph or |
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548 | /// @ref SmartGraph will just refer to this structure. |
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549 | template < typename Gact, typename Gsub > class ErasableHierarchyGraph:public HierarchyGraph < Gact, |
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550 | Gsub |
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551 | > |
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552 | { |
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553 | public: |
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554 | /// Deletes a node. |
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555 | void erase (typename Gact::Node n) |
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556 | { |
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557 | actuallayer.erase (n); |
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558 | } |
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559 | /// Deletes an edge. |
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560 | void erase (typename Gact::Edge e) |
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561 | { |
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562 | actuallayer.erase (e); |
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563 | } |
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564 | |
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565 | /// Defalult constructor. |
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566 | ErasableHierarchyGraph () |
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567 | { |
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568 | } |
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569 | ///Copy consructor. |
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570 | ErasableHierarchyGraph (const HierarchyGraph < Gact, Gsub > &EPG) |
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571 | { |
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572 | } |
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573 | }; |
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574 | |
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575 | |
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576 | // @} |
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577 | |
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578 | } //namespace lemon |
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579 | |
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580 | |
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581 | #endif // LEMON_SKELETON_GRAPH_H |
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