1 | /* -*- C++ -*- |
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2 | * |
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3 | * lemon/concept/undir_graph_component.h - Part of LEMON, a generic |
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4 | * C++ optimization library |
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5 | * |
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6 | * Copyright (C) 2005 Egervary Jeno Kombinatorikus Optimalizalasi |
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7 | * Kutatocsoport (Egervary Research Group on Combinatorial Optimization, |
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8 | * EGRES). |
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9 | * |
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10 | * Permission to use, modify and distribute this software is granted |
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11 | * provided that this copyright notice appears in all copies. For |
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12 | * precise terms see the accompanying LICENSE file. |
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13 | * |
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14 | * This software is provided "AS IS" with no warranty of any kind, |
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15 | * express or implied, and with no claim as to its suitability for any |
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16 | * purpose. |
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17 | * |
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18 | */ |
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19 | |
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20 | ///\ingroup graph_concepts |
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21 | ///\file |
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22 | ///\brief Undirected graphs and components of. |
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23 | |
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24 | |
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25 | #ifndef LEMON_CONCEPT_UNDIR_GRAPH_H |
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26 | #define LEMON_CONCEPT_UNDIR_GRAPH_H |
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27 | |
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28 | #include <lemon/concept/graph_component.h> |
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29 | #include <lemon/concept/graph.h> |
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30 | #include <lemon/utility.h> |
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31 | |
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32 | namespace lemon { |
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33 | namespace concept { |
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34 | |
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35 | /// Skeleton class which describes an edge with direction in \ref |
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36 | /// UndirGraph "undirected graph". |
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37 | template <typename UndirGraph> |
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38 | class UndirGraphEdge : public UndirGraph::UndirEdge { |
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39 | typedef typename UndirGraph::UndirEdge UndirEdge; |
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40 | typedef typename UndirGraph::Node Node; |
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41 | public: |
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42 | |
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43 | /// \e |
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44 | UndirGraphEdge() {} |
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45 | |
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46 | /// \e |
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47 | UndirGraphEdge(const UndirGraphEdge& e) : UndirGraph::UndirEdge(e) {} |
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48 | |
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49 | /// \e |
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50 | UndirGraphEdge(Invalid) {} |
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51 | |
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52 | /// \brief Directed edge from undirected edge and a source node. |
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53 | /// |
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54 | /// Constructs a directed edge from undirected edge and a source node. |
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55 | /// |
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56 | /// \note You have to specify the graph for this constructor. |
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57 | UndirGraphEdge(const UndirGraph &g, |
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58 | UndirEdge undir_edge, Node n) { |
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59 | ignore_unused_variable_warning(undir_edge); |
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60 | ignore_unused_variable_warning(g); |
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61 | ignore_unused_variable_warning(n); |
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62 | } |
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63 | |
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64 | /// \e |
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65 | UndirGraphEdge& operator=(UndirGraphEdge) { return *this; } |
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66 | |
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67 | /// \e |
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68 | bool operator==(UndirGraphEdge) const { return true; } |
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69 | /// \e |
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70 | bool operator!=(UndirGraphEdge) const { return false; } |
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71 | |
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72 | /// \e |
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73 | bool operator<(UndirGraphEdge) const { return false; } |
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74 | |
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75 | template <typename Edge> |
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76 | struct Constraints { |
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77 | void constraints() { |
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78 | const_constraints(); |
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79 | } |
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80 | void const_constraints() const { |
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81 | /// \bug This should be is_base_and_derived ... |
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82 | UndirEdge ue = e; |
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83 | ue = e; |
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84 | |
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85 | Edge e_with_source(graph,ue,n); |
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86 | ignore_unused_variable_warning(e_with_source); |
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87 | } |
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88 | Edge e; |
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89 | UndirEdge ue; |
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90 | UndirGraph graph; |
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91 | Node n; |
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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 | struct BaseIterableUndirGraphConcept { |
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97 | |
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98 | template <typename Graph> |
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99 | struct Constraints { |
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100 | |
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101 | typedef typename Graph::UndirEdge UndirEdge; |
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102 | typedef typename Graph::Edge Edge; |
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103 | typedef typename Graph::Node Node; |
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104 | |
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105 | void constraints() { |
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106 | checkConcept<BaseIterableGraphComponent, Graph>(); |
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107 | checkConcept<GraphItem<>, UndirEdge>(); |
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108 | //checkConcept<UndirGraphEdge<Graph>, Edge>(); |
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109 | |
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110 | graph.first(ue); |
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111 | graph.next(ue); |
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112 | |
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113 | const_constraints(); |
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114 | } |
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115 | void const_constraints() { |
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116 | Node n; |
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117 | n = graph.target(ue); |
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118 | n = graph.source(ue); |
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119 | n = graph.oppositeNode(n0, ue); |
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120 | |
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121 | bool b; |
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122 | b = graph.direction(e); |
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123 | Edge e = graph.direct(UndirEdge(), true); |
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124 | e = graph.direct(UndirEdge(), n); |
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125 | |
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126 | ignore_unused_variable_warning(b); |
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127 | } |
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128 | |
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129 | Graph graph; |
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130 | Edge e; |
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131 | Node n0; |
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132 | UndirEdge ue; |
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133 | }; |
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134 | |
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135 | }; |
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136 | |
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137 | |
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138 | struct IterableUndirGraphConcept { |
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139 | |
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140 | template <typename Graph> |
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141 | struct Constraints { |
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142 | void constraints() { |
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143 | /// \todo we don't need the iterable component to be base iterable |
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144 | /// Don't we really??? |
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145 | //checkConcept< BaseIterableUndirGraphConcept, Graph > (); |
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146 | |
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147 | checkConcept<IterableGraphComponent, Graph> (); |
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148 | |
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149 | typedef typename Graph::UndirEdge UndirEdge; |
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150 | typedef typename Graph::UndirEdgeIt UndirEdgeIt; |
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151 | typedef typename Graph::IncEdgeIt IncEdgeIt; |
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152 | |
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153 | checkConcept<GraphIterator<Graph, UndirEdge>, UndirEdgeIt>(); |
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154 | checkConcept<GraphIncIterator<Graph, UndirEdge>, IncEdgeIt>(); |
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155 | } |
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156 | }; |
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157 | |
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158 | }; |
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159 | |
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160 | struct MappableUndirGraphConcept { |
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161 | |
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162 | template <typename Graph> |
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163 | struct Constraints { |
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164 | |
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165 | struct Dummy { |
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166 | int value; |
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167 | Dummy() : value(0) {} |
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168 | Dummy(int _v) : value(_v) {} |
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169 | }; |
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170 | |
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171 | void constraints() { |
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172 | checkConcept<MappableGraphComponent, Graph>(); |
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173 | |
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174 | typedef typename Graph::template UndirEdgeMap<int> IntMap; |
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175 | checkConcept<GraphMap<Graph, typename Graph::UndirEdge, int>, |
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176 | IntMap >(); |
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177 | |
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178 | typedef typename Graph::template UndirEdgeMap<bool> BoolMap; |
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179 | checkConcept<GraphMap<Graph, typename Graph::UndirEdge, bool>, |
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180 | BoolMap >(); |
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181 | |
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182 | typedef typename Graph::template UndirEdgeMap<Dummy> DummyMap; |
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183 | checkConcept<GraphMap<Graph, typename Graph::UndirEdge, Dummy>, |
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184 | DummyMap >(); |
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185 | } |
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186 | }; |
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187 | |
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188 | }; |
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189 | |
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190 | struct ExtendableUndirGraphConcept { |
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191 | |
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192 | template <typename Graph> |
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193 | struct Constraints { |
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194 | void constraints() { |
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195 | node_a = graph.addNode(); |
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196 | uedge = graph.addEdge(node_a, node_b); |
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197 | } |
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198 | typename Graph::Node node_a, node_b; |
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199 | typename Graph::UndirEdge uedge; |
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200 | Graph graph; |
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201 | }; |
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202 | |
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203 | }; |
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204 | |
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205 | struct ErasableUndirGraphConcept { |
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206 | |
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207 | template <typename Graph> |
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208 | struct Constraints { |
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209 | void constraints() { |
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210 | graph.erase(n); |
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211 | graph.erase(e); |
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212 | } |
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213 | Graph graph; |
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214 | typename Graph::Node n; |
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215 | typename Graph::UndirEdge e; |
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216 | }; |
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217 | |
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218 | }; |
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219 | |
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220 | /// \addtogroup graph_concepts |
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221 | /// @{ |
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222 | |
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223 | |
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224 | /// Class describing the concept of Undirected Graphs. |
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225 | |
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226 | /// This class describes the common interface of all Undirected |
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227 | /// Graphs. |
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228 | /// |
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229 | /// As all concept describing classes it provides only interface |
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230 | /// without any sensible implementation. So any algorithm for |
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231 | /// undirected graph should compile with this class, but it will not |
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232 | /// run properly, of couse. |
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233 | /// |
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234 | /// In LEMON undirected graphs also fulfill the concept of directed |
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235 | /// graphs (\ref lemon::concept::Graph "Graph Concept"). For |
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236 | /// explanation of this and more see also the page \ref undir_graphs, |
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237 | /// a tutorial about undirected graphs. |
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238 | /// |
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239 | /// You can assume that all undirected graph can be handled |
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240 | /// as a static directed graph. This way it is fully conform |
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241 | /// to the StaticGraph concept. |
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242 | |
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243 | class UndirGraph { |
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244 | public: |
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245 | ///\e |
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246 | |
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247 | ///\todo undocumented |
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248 | /// |
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249 | typedef True UndirTag; |
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250 | |
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251 | /// The base type of node iterators, |
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252 | /// or in other words, the trivial node iterator. |
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253 | |
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254 | /// This is the base type of each node iterator, |
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255 | /// thus each kind of node iterator converts to this. |
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256 | /// More precisely each kind of node iterator should be inherited |
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257 | /// from the trivial node iterator. |
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258 | class Node { |
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259 | public: |
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260 | /// Default constructor |
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261 | |
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262 | /// @warning The default constructor sets the iterator |
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263 | /// to an undefined value. |
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264 | Node() { } |
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265 | /// Copy constructor. |
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266 | |
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267 | /// Copy constructor. |
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268 | /// |
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269 | Node(const Node&) { } |
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270 | |
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271 | /// Invalid constructor \& conversion. |
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272 | |
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273 | /// This constructor initializes the iterator to be invalid. |
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274 | /// \sa Invalid for more details. |
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275 | Node(Invalid) { } |
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276 | /// Equality operator |
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277 | |
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278 | /// Two iterators are equal if and only if they point to the |
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279 | /// same object or both are invalid. |
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280 | bool operator==(Node) const { return true; } |
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281 | |
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282 | /// Inequality operator |
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283 | |
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284 | /// \sa operator==(Node n) |
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285 | /// |
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286 | bool operator!=(Node) const { return true; } |
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287 | |
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288 | /// Artificial ordering operator. |
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289 | |
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290 | /// To allow the use of graph descriptors as key type in std::map or |
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291 | /// similar associative container we require this. |
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292 | /// |
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293 | /// \note This operator only have to define some strict ordering of |
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294 | /// the items; this order has nothing to do with the iteration |
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295 | /// ordering of the items. |
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296 | /// |
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297 | /// \bug This is a technical requirement. Do we really need this? |
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298 | bool operator<(Node) const { return false; } |
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299 | |
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300 | }; |
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301 | |
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302 | /// This iterator goes through each node. |
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303 | |
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304 | /// This iterator goes through each node. |
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305 | /// Its usage is quite simple, for example you can count the number |
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306 | /// of nodes in graph \c g of type \c Graph like this: |
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307 | /// \code |
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308 | /// int count=0; |
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309 | /// for (Graph::NodeIt n(g); n!=INVALID; ++n) ++count; |
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310 | /// \endcode |
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311 | class NodeIt : public Node { |
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312 | public: |
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313 | /// Default constructor |
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314 | |
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315 | /// @warning The default constructor sets the iterator |
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316 | /// to an undefined value. |
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317 | NodeIt() { } |
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318 | /// Copy constructor. |
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319 | |
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320 | /// Copy constructor. |
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321 | /// |
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322 | NodeIt(const NodeIt& n) : Node(n) { } |
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323 | /// Invalid constructor \& conversion. |
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324 | |
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325 | /// Initialize the iterator to be invalid. |
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326 | /// \sa Invalid for more details. |
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327 | NodeIt(Invalid) { } |
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328 | /// Sets the iterator to the first node. |
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329 | |
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330 | /// Sets the iterator to the first node of \c g. |
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331 | /// |
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332 | NodeIt(const UndirGraph&) { } |
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333 | /// Node -> NodeIt conversion. |
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334 | |
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335 | /// Sets the iterator to the node of \c the graph pointed by |
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336 | /// the trivial iterator. |
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337 | /// This feature necessitates that each time we |
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338 | /// iterate the edge-set, the iteration order is the same. |
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339 | NodeIt(const UndirGraph&, const Node&) { } |
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340 | /// Next node. |
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341 | |
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342 | /// Assign the iterator to the next node. |
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343 | /// |
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344 | NodeIt& operator++() { return *this; } |
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345 | }; |
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346 | |
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347 | |
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348 | /// The base type of the undirected edge iterators. |
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349 | |
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350 | /// The base type of the undirected edge iterators. |
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351 | /// |
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352 | class UndirEdge { |
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353 | public: |
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354 | /// Default constructor |
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355 | |
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356 | /// @warning The default constructor sets the iterator |
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357 | /// to an undefined value. |
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358 | UndirEdge() { } |
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359 | /// Copy constructor. |
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360 | |
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361 | /// Copy constructor. |
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362 | /// |
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363 | UndirEdge(const UndirEdge&) { } |
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364 | /// Initialize the iterator to be invalid. |
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365 | |
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366 | /// Initialize the iterator to be invalid. |
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367 | /// |
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368 | UndirEdge(Invalid) { } |
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369 | /// Equality operator |
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370 | |
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371 | /// Two iterators are equal if and only if they point to the |
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372 | /// same object or both are invalid. |
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373 | bool operator==(UndirEdge) const { return true; } |
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374 | /// Inequality operator |
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375 | |
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376 | /// \sa operator==(UndirEdge n) |
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377 | /// |
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378 | bool operator!=(UndirEdge) const { return true; } |
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379 | |
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380 | /// Artificial ordering operator. |
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381 | |
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382 | /// To allow the use of graph descriptors as key type in std::map or |
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383 | /// similar associative container we require this. |
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384 | /// |
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385 | /// \note This operator only have to define some strict ordering of |
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386 | /// the items; this order has nothing to do with the iteration |
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387 | /// ordering of the items. |
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388 | /// |
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389 | /// \bug This is a technical requirement. Do we really need this? |
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390 | bool operator<(UndirEdge) const { return false; } |
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391 | }; |
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392 | |
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393 | /// This iterator goes through each undirected edge. |
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394 | |
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395 | /// This iterator goes through each undirected edge of a graph. |
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396 | /// Its usage is quite simple, for example you can count the number |
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397 | /// of undirected edges in a graph \c g of type \c Graph as follows: |
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398 | /// \code |
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399 | /// int count=0; |
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400 | /// for(Graph::UndirEdgeIt e(g); e!=INVALID; ++e) ++count; |
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401 | /// \endcode |
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402 | class UndirEdgeIt : public UndirEdge { |
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403 | public: |
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404 | /// Default constructor |
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405 | |
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406 | /// @warning The default constructor sets the iterator |
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407 | /// to an undefined value. |
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408 | UndirEdgeIt() { } |
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409 | /// Copy constructor. |
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410 | |
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411 | /// Copy constructor. |
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412 | /// |
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413 | UndirEdgeIt(const UndirEdgeIt& e) : UndirEdge(e) { } |
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414 | /// Initialize the iterator to be invalid. |
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415 | |
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416 | /// Initialize the iterator to be invalid. |
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417 | /// |
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418 | UndirEdgeIt(Invalid) { } |
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419 | /// This constructor sets the iterator to the first undirected edge. |
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420 | |
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421 | /// This constructor sets the iterator to the first undirected edge. |
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422 | UndirEdgeIt(const UndirGraph&) { } |
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423 | /// UndirEdge -> UndirEdgeIt conversion |
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424 | |
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425 | /// Sets the iterator to the value of the trivial iterator. |
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426 | /// This feature necessitates that each time we |
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427 | /// iterate the undirected edge-set, the iteration order is the |
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428 | /// same. |
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429 | UndirEdgeIt(const UndirGraph&, const UndirEdge&) { } |
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430 | /// Next undirected edge |
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431 | |
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432 | /// Assign the iterator to the next undirected edge. |
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433 | UndirEdgeIt& operator++() { return *this; } |
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434 | }; |
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435 | |
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436 | /// \brief This iterator goes trough the incident undirected |
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437 | /// edges of a node. |
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438 | /// |
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439 | /// This iterator goes trough the incident undirected edges |
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440 | /// of a certain node |
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441 | /// of a graph. |
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442 | /// Its usage is quite simple, for example you can compute the |
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443 | /// degree (i.e. count the number |
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444 | /// of incident edges of a node \c n |
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445 | /// in graph \c g of type \c Graph as follows. |
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446 | /// \code |
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447 | /// int count=0; |
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448 | /// for(Graph::IncEdgeIt e(g, n); e!=INVALID; ++e) ++count; |
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449 | /// \endcode |
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450 | class IncEdgeIt : public UndirEdge { |
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451 | public: |
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452 | /// Default constructor |
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453 | |
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454 | /// @warning The default constructor sets the iterator |
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455 | /// to an undefined value. |
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456 | IncEdgeIt() { } |
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457 | /// Copy constructor. |
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458 | |
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459 | /// Copy constructor. |
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460 | /// |
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461 | IncEdgeIt(const IncEdgeIt& e) : UndirEdge(e) { } |
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462 | /// Initialize the iterator to be invalid. |
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463 | |
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464 | /// Initialize the iterator to be invalid. |
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465 | /// |
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466 | IncEdgeIt(Invalid) { } |
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467 | /// This constructor sets the iterator to first incident edge. |
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468 | |
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469 | /// This constructor set the iterator to the first incident edge of |
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470 | /// the node. |
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471 | IncEdgeIt(const UndirGraph&, const Node&) { } |
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472 | /// UndirEdge -> IncEdgeIt conversion |
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473 | |
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474 | /// Sets the iterator to the value of the trivial iterator \c e. |
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475 | /// This feature necessitates that each time we |
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476 | /// iterate the edge-set, the iteration order is the same. |
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477 | IncEdgeIt(const UndirGraph&, const UndirEdge&) { } |
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478 | /// Next incident edge |
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479 | |
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480 | /// Assign the iterator to the next incident edge |
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481 | /// of the corresponding node. |
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482 | IncEdgeIt& operator++() { return *this; } |
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483 | }; |
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484 | |
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485 | /// The directed edge type. |
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486 | |
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487 | /// The directed edge type. It can be converted to the |
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488 | /// undirected edge. |
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489 | class Edge : public UndirEdge { |
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490 | public: |
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491 | /// Default constructor |
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492 | |
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493 | /// @warning The default constructor sets the iterator |
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494 | /// to an undefined value. |
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495 | Edge() { } |
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496 | /// Copy constructor. |
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497 | |
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498 | /// Copy constructor. |
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499 | /// |
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500 | Edge(const Edge& e) : UndirEdge(e) { } |
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501 | /// Initialize the iterator to be invalid. |
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502 | |
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503 | /// Initialize the iterator to be invalid. |
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504 | /// |
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505 | Edge(Invalid) { } |
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506 | /// Equality operator |
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507 | |
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508 | /// Two iterators are equal if and only if they point to the |
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509 | /// same object or both are invalid. |
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510 | bool operator==(Edge) const { return true; } |
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511 | /// Inequality operator |
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512 | |
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513 | /// \sa operator==(Edge n) |
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514 | /// |
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515 | bool operator!=(Edge) const { return true; } |
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516 | |
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517 | /// Artificial ordering operator. |
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518 | |
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519 | /// To allow the use of graph descriptors as key type in std::map or |
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520 | /// similar associative container we require this. |
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521 | /// |
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522 | /// \note This operator only have to define some strict ordering of |
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523 | /// the items; this order has nothing to do with the iteration |
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524 | /// ordering of the items. |
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525 | /// |
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526 | /// \bug This is a technical requirement. Do we really need this? |
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527 | bool operator<(Edge) const { return false; } |
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528 | |
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529 | }; |
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530 | /// This iterator goes through each directed edge. |
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531 | |
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532 | /// This iterator goes through each edge of a graph. |
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533 | /// Its usage is quite simple, for example you can count the number |
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534 | /// of edges in a graph \c g of type \c Graph as follows: |
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535 | /// \code |
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536 | /// int count=0; |
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537 | /// for(Graph::EdgeIt e(g); e!=INVALID; ++e) ++count; |
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538 | /// \endcode |
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539 | class EdgeIt : public Edge { |
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540 | public: |
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541 | /// Default constructor |
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542 | |
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543 | /// @warning The default constructor sets the iterator |
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544 | /// to an undefined value. |
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545 | EdgeIt() { } |
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546 | /// Copy constructor. |
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547 | |
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548 | /// Copy constructor. |
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549 | /// |
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550 | EdgeIt(const EdgeIt& e) : Edge(e) { } |
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551 | /// Initialize the iterator to be invalid. |
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552 | |
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553 | /// Initialize the iterator to be invalid. |
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554 | /// |
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555 | EdgeIt(Invalid) { } |
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556 | /// This constructor sets the iterator to the first edge. |
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557 | |
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558 | /// This constructor sets the iterator to the first edge of \c g. |
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559 | ///@param g the graph |
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560 | EdgeIt(const UndirGraph&) { } |
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561 | /// Edge -> EdgeIt conversion |
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562 | |
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563 | /// Sets the iterator to the value of the trivial iterator \c e. |
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564 | /// This feature necessitates that each time we |
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565 | /// iterate the edge-set, the iteration order is the same. |
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566 | EdgeIt(const UndirGraph&, const Edge&) { } |
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567 | ///Next edge |
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568 | |
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569 | /// Assign the iterator to the next edge. |
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570 | EdgeIt& operator++() { return *this; } |
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571 | }; |
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572 | |
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573 | /// This iterator goes trough the outgoing directed edges of a node. |
---|
574 | |
---|
575 | /// This iterator goes trough the \e outgoing edges of a certain node |
---|
576 | /// of a graph. |
---|
577 | /// Its usage is quite simple, for example you can count the number |
---|
578 | /// of outgoing edges of a node \c n |
---|
579 | /// in graph \c g of type \c Graph as follows. |
---|
580 | /// \code |
---|
581 | /// int count=0; |
---|
582 | /// for (Graph::OutEdgeIt e(g, n); e!=INVALID; ++e) ++count; |
---|
583 | /// \endcode |
---|
584 | |
---|
585 | class OutEdgeIt : public Edge { |
---|
586 | public: |
---|
587 | /// Default constructor |
---|
588 | |
---|
589 | /// @warning The default constructor sets the iterator |
---|
590 | /// to an undefined value. |
---|
591 | OutEdgeIt() { } |
---|
592 | /// Copy constructor. |
---|
593 | |
---|
594 | /// Copy constructor. |
---|
595 | /// |
---|
596 | OutEdgeIt(const OutEdgeIt& e) : Edge(e) { } |
---|
597 | /// Initialize the iterator to be invalid. |
---|
598 | |
---|
599 | /// Initialize the iterator to be invalid. |
---|
600 | /// |
---|
601 | OutEdgeIt(Invalid) { } |
---|
602 | /// This constructor sets the iterator to the first outgoing edge. |
---|
603 | |
---|
604 | /// This constructor sets the iterator to the first outgoing edge of |
---|
605 | /// the node. |
---|
606 | ///@param n the node |
---|
607 | ///@param g the graph |
---|
608 | OutEdgeIt(const UndirGraph&, const Node&) { } |
---|
609 | /// Edge -> OutEdgeIt conversion |
---|
610 | |
---|
611 | /// Sets the iterator to the value of the trivial iterator. |
---|
612 | /// This feature necessitates that each time we |
---|
613 | /// iterate the edge-set, the iteration order is the same. |
---|
614 | OutEdgeIt(const UndirGraph&, const Edge&) { } |
---|
615 | ///Next outgoing edge |
---|
616 | |
---|
617 | /// Assign the iterator to the next |
---|
618 | /// outgoing edge of the corresponding node. |
---|
619 | OutEdgeIt& operator++() { return *this; } |
---|
620 | }; |
---|
621 | |
---|
622 | /// This iterator goes trough the incoming directed edges of a node. |
---|
623 | |
---|
624 | /// This iterator goes trough the \e incoming edges of a certain node |
---|
625 | /// of a graph. |
---|
626 | /// Its usage is quite simple, for example you can count the number |
---|
627 | /// of outgoing edges of a node \c n |
---|
628 | /// in graph \c g of type \c Graph as follows. |
---|
629 | /// \code |
---|
630 | /// int count=0; |
---|
631 | /// for(Graph::InEdgeIt e(g, n); e!=INVALID; ++e) ++count; |
---|
632 | /// \endcode |
---|
633 | |
---|
634 | class InEdgeIt : public Edge { |
---|
635 | public: |
---|
636 | /// Default constructor |
---|
637 | |
---|
638 | /// @warning The default constructor sets the iterator |
---|
639 | /// to an undefined value. |
---|
640 | InEdgeIt() { } |
---|
641 | /// Copy constructor. |
---|
642 | |
---|
643 | /// Copy constructor. |
---|
644 | /// |
---|
645 | InEdgeIt(const InEdgeIt& e) : Edge(e) { } |
---|
646 | /// Initialize the iterator to be invalid. |
---|
647 | |
---|
648 | /// Initialize the iterator to be invalid. |
---|
649 | /// |
---|
650 | InEdgeIt(Invalid) { } |
---|
651 | /// This constructor sets the iterator to first incoming edge. |
---|
652 | |
---|
653 | /// This constructor set the iterator to the first incoming edge of |
---|
654 | /// the node. |
---|
655 | ///@param n the node |
---|
656 | ///@param g the graph |
---|
657 | InEdgeIt(const UndirGraph&, const Node&) { } |
---|
658 | /// Edge -> InEdgeIt conversion |
---|
659 | |
---|
660 | /// Sets the iterator to the value of the trivial iterator \c e. |
---|
661 | /// This feature necessitates that each time we |
---|
662 | /// iterate the edge-set, the iteration order is the same. |
---|
663 | InEdgeIt(const UndirGraph&, const Edge&) { } |
---|
664 | /// Next incoming edge |
---|
665 | |
---|
666 | /// Assign the iterator to the next inedge of the corresponding node. |
---|
667 | /// |
---|
668 | InEdgeIt& operator++() { return *this; } |
---|
669 | }; |
---|
670 | |
---|
671 | /// \brief Read write map of the nodes to type \c T. |
---|
672 | /// |
---|
673 | /// ReadWrite map of the nodes to type \c T. |
---|
674 | /// \sa Reference |
---|
675 | /// \warning Making maps that can handle bool type (NodeMap<bool>) |
---|
676 | /// needs some extra attention! |
---|
677 | template<class T> |
---|
678 | class NodeMap : public ReadWriteMap< Node, T > |
---|
679 | { |
---|
680 | public: |
---|
681 | |
---|
682 | ///\e |
---|
683 | NodeMap(const UndirGraph&) { } |
---|
684 | ///\e |
---|
685 | NodeMap(const UndirGraph&, T) { } |
---|
686 | |
---|
687 | ///Copy constructor |
---|
688 | NodeMap(const NodeMap& nm) : ReadWriteMap< Node, T >(nm) { } |
---|
689 | ///Assignment operator |
---|
690 | NodeMap& operator=(const NodeMap&) { return *this; } |
---|
691 | // \todo fix this concept |
---|
692 | }; |
---|
693 | |
---|
694 | /// \brief Read write map of the directed edges to type \c T. |
---|
695 | /// |
---|
696 | /// Reference map of the directed edges to type \c T. |
---|
697 | /// \sa Reference |
---|
698 | /// \warning Making maps that can handle bool type (EdgeMap<bool>) |
---|
699 | /// needs some extra attention! |
---|
700 | template<class T> |
---|
701 | class EdgeMap : public ReadWriteMap<Edge,T> |
---|
702 | { |
---|
703 | public: |
---|
704 | |
---|
705 | ///\e |
---|
706 | EdgeMap(const UndirGraph&) { } |
---|
707 | ///\e |
---|
708 | EdgeMap(const UndirGraph&, T) { } |
---|
709 | ///Copy constructor |
---|
710 | EdgeMap(const EdgeMap& em) : ReadWriteMap<Edge,T>(em) { } |
---|
711 | ///Assignment operator |
---|
712 | EdgeMap& operator=(const EdgeMap&) { return *this; } |
---|
713 | // \todo fix this concept |
---|
714 | }; |
---|
715 | |
---|
716 | /// Read write map of the undirected edges to type \c T. |
---|
717 | |
---|
718 | /// Reference map of the edges to type \c T. |
---|
719 | /// \sa Reference |
---|
720 | /// \warning Making maps that can handle bool type (UndirEdgeMap<bool>) |
---|
721 | /// needs some extra attention! |
---|
722 | template<class T> |
---|
723 | class UndirEdgeMap : public ReadWriteMap<UndirEdge,T> |
---|
724 | { |
---|
725 | public: |
---|
726 | |
---|
727 | ///\e |
---|
728 | UndirEdgeMap(const UndirGraph&) { } |
---|
729 | ///\e |
---|
730 | UndirEdgeMap(const UndirGraph&, T) { } |
---|
731 | ///Copy constructor |
---|
732 | UndirEdgeMap(const UndirEdgeMap& em) : ReadWriteMap<UndirEdge,T>(em) {} |
---|
733 | ///Assignment operator |
---|
734 | UndirEdgeMap &operator=(const UndirEdgeMap&) { return *this; } |
---|
735 | // \todo fix this concept |
---|
736 | }; |
---|
737 | |
---|
738 | /// \brief Direct the given undirected edge. |
---|
739 | /// |
---|
740 | /// Direct the given undirected edge. The returned edge source |
---|
741 | /// will be the given edge. |
---|
742 | Edge direct(const UndirEdge&, const Node&) const { |
---|
743 | return INVALID; |
---|
744 | } |
---|
745 | |
---|
746 | /// \brief Direct the given undirected edge. |
---|
747 | /// |
---|
748 | /// Direct the given undirected edge. The returned edge source |
---|
749 | /// will be the source of the undirected edge if the given bool |
---|
750 | /// is true. |
---|
751 | Edge direct(const UndirEdge&, bool) const { |
---|
752 | return INVALID; |
---|
753 | } |
---|
754 | |
---|
755 | /// \brief Returns true if the edge has default orientation. |
---|
756 | /// |
---|
757 | /// Returns whether the given directed edge is same orientation as |
---|
758 | /// the corresponding undirected edge. |
---|
759 | bool direction(Edge) const { return true; } |
---|
760 | |
---|
761 | /// \brief Returns the opposite directed edge. |
---|
762 | /// |
---|
763 | /// Returns the opposite directed edge. |
---|
764 | Edge oppositeEdge(Edge) const { return INVALID; } |
---|
765 | |
---|
766 | /// \brief Opposite node on an edge |
---|
767 | /// |
---|
768 | /// \return the opposite of the given Node on the given Edge |
---|
769 | Node oppositeNode(Node, UndirEdge) const { return INVALID; } |
---|
770 | |
---|
771 | /// \brief First node of the undirected edge. |
---|
772 | /// |
---|
773 | /// \return the first node of the given UndirEdge. |
---|
774 | /// |
---|
775 | /// Naturally undirectected edges don't have direction and thus |
---|
776 | /// don't have source and target node. But we use these two methods |
---|
777 | /// to query the two endnodes of the edge. The direction of the edge |
---|
778 | /// which arises this way is called the inherent direction of the |
---|
779 | /// undirected edge, and is used to define the "default" direction |
---|
780 | /// of the directed versions of the edges. |
---|
781 | /// \sa direction |
---|
782 | Node source(UndirEdge) const { return INVALID; } |
---|
783 | |
---|
784 | /// \brief Second node of the undirected edge. |
---|
785 | Node target(UndirEdge) const { return INVALID; } |
---|
786 | |
---|
787 | /// \brief Source node of the directed edge. |
---|
788 | Node source(Edge) const { return INVALID; } |
---|
789 | |
---|
790 | /// \brief Target node of the directed edge. |
---|
791 | Node target(Edge) const { return INVALID; } |
---|
792 | |
---|
793 | /// \brief First node of the graph |
---|
794 | /// |
---|
795 | /// \note This method is part of so called \ref |
---|
796 | /// developpers_interface "Developpers' interface", so it shouldn't |
---|
797 | /// be used in an end-user program. |
---|
798 | void first(Node&) const {} |
---|
799 | /// \brief Next node of the graph |
---|
800 | /// |
---|
801 | /// \note This method is part of so called \ref |
---|
802 | /// developpers_interface "Developpers' interface", so it shouldn't |
---|
803 | /// be used in an end-user program. |
---|
804 | void next(Node&) const {} |
---|
805 | |
---|
806 | /// \brief First undirected edge of the graph |
---|
807 | /// |
---|
808 | /// \note This method is part of so called \ref |
---|
809 | /// developpers_interface "Developpers' interface", so it shouldn't |
---|
810 | /// be used in an end-user program. |
---|
811 | void first(UndirEdge&) const {} |
---|
812 | /// \brief Next undirected edge of the graph |
---|
813 | /// |
---|
814 | /// \note This method is part of so called \ref |
---|
815 | /// developpers_interface "Developpers' interface", so it shouldn't |
---|
816 | /// be used in an end-user program. |
---|
817 | void next(UndirEdge&) const {} |
---|
818 | |
---|
819 | /// \brief First directed edge of the graph |
---|
820 | /// |
---|
821 | /// \note This method is part of so called \ref |
---|
822 | /// developpers_interface "Developpers' interface", so it shouldn't |
---|
823 | /// be used in an end-user program. |
---|
824 | void first(Edge&) const {} |
---|
825 | /// \brief Next directed edge of the graph |
---|
826 | /// |
---|
827 | /// \note This method is part of so called \ref |
---|
828 | /// developpers_interface "Developpers' interface", so it shouldn't |
---|
829 | /// be used in an end-user program. |
---|
830 | void next(Edge&) const {} |
---|
831 | |
---|
832 | /// \brief First outgoing edge from a given node |
---|
833 | /// |
---|
834 | /// \note This method is part of so called \ref |
---|
835 | /// developpers_interface "Developpers' interface", so it shouldn't |
---|
836 | /// be used in an end-user program. |
---|
837 | void firstOut(Edge&, Node) const {} |
---|
838 | /// \brief Next outgoing edge to a node |
---|
839 | /// |
---|
840 | /// \note This method is part of so called \ref |
---|
841 | /// developpers_interface "Developpers' interface", so it shouldn't |
---|
842 | /// be used in an end-user program. |
---|
843 | void nextOut(Edge&) const {} |
---|
844 | |
---|
845 | /// \brief First incoming edge to a given node |
---|
846 | /// |
---|
847 | /// \note This method is part of so called \ref |
---|
848 | /// developpers_interface "Developpers' interface", so it shouldn't |
---|
849 | /// be used in an end-user program. |
---|
850 | void firstIn(Edge&, Node) const {} |
---|
851 | /// \brief Next incoming edge to a node |
---|
852 | /// |
---|
853 | /// \note This method is part of so called \ref |
---|
854 | /// developpers_interface "Developpers' interface", so it shouldn't |
---|
855 | /// be used in an end-user program. |
---|
856 | void nextIn(Edge&) const {} |
---|
857 | |
---|
858 | |
---|
859 | /// \brief Base node of the iterator |
---|
860 | /// |
---|
861 | /// Returns the base node (the source in this case) of the iterator |
---|
862 | Node baseNode(OutEdgeIt e) const { |
---|
863 | return source(e); |
---|
864 | } |
---|
865 | /// \brief Running node of the iterator |
---|
866 | /// |
---|
867 | /// Returns the running node (the target in this case) of the |
---|
868 | /// iterator |
---|
869 | Node runningNode(OutEdgeIt e) const { |
---|
870 | return target(e); |
---|
871 | } |
---|
872 | |
---|
873 | /// \brief Base node of the iterator |
---|
874 | /// |
---|
875 | /// Returns the base node (the target in this case) of the iterator |
---|
876 | Node baseNode(InEdgeIt e) const { |
---|
877 | return target(e); |
---|
878 | } |
---|
879 | /// \brief Running node of the iterator |
---|
880 | /// |
---|
881 | /// Returns the running node (the source in this case) of the |
---|
882 | /// iterator |
---|
883 | Node runningNode(InEdgeIt e) const { |
---|
884 | return source(e); |
---|
885 | } |
---|
886 | |
---|
887 | /// \brief Base node of the iterator |
---|
888 | /// |
---|
889 | /// Returns the base node of the iterator |
---|
890 | Node baseNode(IncEdgeIt) const { |
---|
891 | return INVALID; |
---|
892 | } |
---|
893 | |
---|
894 | /// \brief Running node of the iterator |
---|
895 | /// |
---|
896 | /// Returns the running node of the iterator |
---|
897 | Node runningNode(IncEdgeIt) const { |
---|
898 | return INVALID; |
---|
899 | } |
---|
900 | |
---|
901 | template <typename Graph> |
---|
902 | struct Constraints { |
---|
903 | void constraints() { |
---|
904 | checkConcept<BaseIterableUndirGraphConcept, Graph>(); |
---|
905 | checkConcept<IterableUndirGraphConcept, Graph>(); |
---|
906 | checkConcept<MappableUndirGraphConcept, Graph>(); |
---|
907 | } |
---|
908 | }; |
---|
909 | |
---|
910 | }; |
---|
911 | |
---|
912 | /// \brief An empty non-static undirected graph class. |
---|
913 | /// |
---|
914 | /// This class provides everything that \ref UndirGraph does. |
---|
915 | /// Additionally it enables building graphs from scratch. |
---|
916 | class ExtendableUndirGraph : public UndirGraph { |
---|
917 | public: |
---|
918 | |
---|
919 | /// \brief Add a new node to the graph. |
---|
920 | /// |
---|
921 | /// Add a new node to the graph. |
---|
922 | /// \return the new node. |
---|
923 | Node addNode(); |
---|
924 | |
---|
925 | /// \brief Add a new undirected edge to the graph. |
---|
926 | /// |
---|
927 | /// Add a new undirected edge to the graph. |
---|
928 | /// \return the new edge. |
---|
929 | UndirEdge addEdge(const Node& from, const Node& to); |
---|
930 | |
---|
931 | /// \brief Resets the graph. |
---|
932 | /// |
---|
933 | /// This function deletes all undirected edges and nodes of the graph. |
---|
934 | /// It also frees the memory allocated to store them. |
---|
935 | void clear() { } |
---|
936 | |
---|
937 | template <typename Graph> |
---|
938 | struct Constraints { |
---|
939 | void constraints() { |
---|
940 | checkConcept<BaseIterableUndirGraphConcept, Graph>(); |
---|
941 | checkConcept<IterableUndirGraphConcept, Graph>(); |
---|
942 | checkConcept<MappableUndirGraphConcept, Graph>(); |
---|
943 | |
---|
944 | checkConcept<UndirGraph, Graph>(); |
---|
945 | checkConcept<ExtendableUndirGraphConcept, Graph>(); |
---|
946 | checkConcept<ClearableGraphComponent, Graph>(); |
---|
947 | } |
---|
948 | }; |
---|
949 | |
---|
950 | }; |
---|
951 | |
---|
952 | /// \brief An empty erasable undirected graph class. |
---|
953 | /// |
---|
954 | /// This class is an extension of \ref ExtendableUndirGraph. It makes it |
---|
955 | /// possible to erase undirected edges or nodes. |
---|
956 | class ErasableUndirGraph : public ExtendableUndirGraph { |
---|
957 | public: |
---|
958 | |
---|
959 | /// \brief Deletes a node. |
---|
960 | /// |
---|
961 | /// Deletes a node. |
---|
962 | /// |
---|
963 | void erase(Node) { } |
---|
964 | /// \brief Deletes an undirected edge. |
---|
965 | /// |
---|
966 | /// Deletes an undirected edge. |
---|
967 | /// |
---|
968 | void erase(UndirEdge) { } |
---|
969 | |
---|
970 | template <typename Graph> |
---|
971 | struct Constraints { |
---|
972 | void constraints() { |
---|
973 | checkConcept<ExtendableUndirGraph, Graph>(); |
---|
974 | checkConcept<ErasableUndirGraphConcept, Graph>(); |
---|
975 | } |
---|
976 | }; |
---|
977 | |
---|
978 | }; |
---|
979 | |
---|
980 | /// @} |
---|
981 | |
---|
982 | } |
---|
983 | |
---|
984 | } |
---|
985 | |
---|
986 | #endif |
---|