[962] | 1 | /* -*- C++ -*- |
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| 2 | * |
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[1435] | 3 | * lemon/concept/undir_graph_component.h - Part of LEMON, a generic |
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[962] | 4 | * C++ optimization library |
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| 5 | * |
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[1164] | 6 | * Copyright (C) 2005 Egervary Jeno Kombinatorikus Optimalizalasi |
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[1359] | 7 | * Kutatocsoport (Egervary Research Group on Combinatorial Optimization, |
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[962] | 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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[1030] | 20 | ///\ingroup graph_concepts |
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[962] | 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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[1620] | 29 | #include <lemon/concept/graph.h> |
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[1448] | 30 | #include <lemon/utility.h> |
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[962] | 31 | |
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| 32 | namespace lemon { |
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| 33 | namespace concept { |
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| 34 | |
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[1030] | 35 | /// Skeleton class which describes an edge with direction in \ref |
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| 36 | /// UndirGraph "undirected graph". |
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[1158] | 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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[1030] | 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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[1367] | 47 | UndirGraphEdge(const UndirGraphEdge& e) : UndirGraph::UndirEdge(e) {} |
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[1030] | 48 | |
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| 49 | /// \e |
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| 50 | UndirGraphEdge(Invalid) {} |
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| 51 | |
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[1158] | 52 | /// \brief Directed edge from undirected edge and a source node. |
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[1030] | 53 | /// |
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[1158] | 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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[1030] | 59 | ignore_unused_variable_warning(undir_edge); |
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[1158] | 60 | ignore_unused_variable_warning(g); |
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| 61 | ignore_unused_variable_warning(n); |
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[1030] | 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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[1158] | 78 | const_constraints(); |
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| 79 | } |
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| 80 | void const_constraints() const { |
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[1030] | 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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[1158] | 85 | Edge e_with_source(graph,ue,n); |
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| 86 | ignore_unused_variable_warning(e_with_source); |
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[1030] | 87 | } |
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| 88 | Edge e; |
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[1158] | 89 | UndirEdge ue; |
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| 90 | UndirGraph graph; |
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| 91 | Node n; |
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[1030] | 92 | }; |
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| 93 | }; |
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| 94 | |
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[962] | 95 | |
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| 96 | struct BaseIterableUndirGraphConcept { |
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[989] | 97 | |
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[1022] | 98 | template <typename Graph> |
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| 99 | struct Constraints { |
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[962] | 100 | |
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[1022] | 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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[962] | 104 | |
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[1022] | 105 | void constraints() { |
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| 106 | checkConcept<BaseIterableGraphComponent, Graph>(); |
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[1030] | 107 | checkConcept<GraphItem<>, UndirEdge>(); |
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[1620] | 108 | //checkConcept<UndirGraphEdge<Graph>, Edge>(); |
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[962] | 109 | |
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[1030] | 110 | graph.first(ue); |
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| 111 | graph.next(ue); |
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[1022] | 112 | |
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[1030] | 113 | const_constraints(); |
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| 114 | } |
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| 115 | void const_constraints() { |
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[1022] | 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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[1030] | 119 | n = graph.oppositeNode(n0, ue); |
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[1022] | 120 | |
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[1030] | 121 | bool b; |
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[1627] | 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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[1030] | 126 | ignore_unused_variable_warning(b); |
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[1022] | 127 | } |
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[1030] | 128 | |
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| 129 | Graph graph; |
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[1022] | 130 | Edge e; |
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[1030] | 131 | Node n0; |
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| 132 | UndirEdge ue; |
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[1022] | 133 | }; |
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| 134 | |
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[962] | 135 | }; |
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| 136 | |
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[1022] | 137 | |
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[962] | 138 | struct IterableUndirGraphConcept { |
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| 139 | |
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[1022] | 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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[962] | 146 | |
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[1022] | 147 | checkConcept<IterableGraphComponent, Graph> (); |
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[1021] | 148 | |
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[1022] | 149 | typedef typename Graph::UndirEdge UndirEdge; |
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| 150 | typedef typename Graph::UndirEdgeIt UndirEdgeIt; |
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[1030] | 151 | typedef typename Graph::IncEdgeIt IncEdgeIt; |
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[1022] | 152 | |
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| 153 | checkConcept<GraphIterator<Graph, UndirEdge>, UndirEdgeIt>(); |
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[1030] | 154 | checkConcept<GraphIncIterator<Graph, UndirEdge>, IncEdgeIt>(); |
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[1022] | 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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[1620] | 220 | /// \addtogroup graph_concepts |
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| 221 | /// @{ |
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| 222 | |
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| 223 | |
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[1030] | 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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[1627] | 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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[1030] | 242 | |
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[1627] | 243 | class UndirGraph { |
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[1022] | 244 | public: |
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[1448] | 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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[1022] | 250 | |
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[1627] | 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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[1620] | 348 | /// The base type of the undirected edge iterators. |
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[1627] | 349 | |
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[1620] | 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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[1030] | 355 | |
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[1620] | 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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[1030] | 360 | |
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[1620] | 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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[1030] | 365 | |
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[1620] | 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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[1030] | 370 | |
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[1620] | 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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[1030] | 375 | |
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[1620] | 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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[1030] | 379 | |
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[1627] | 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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[1030] | 392 | |
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[1620] | 393 | /// This iterator goes through each undirected edge. |
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[1030] | 394 | |
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[1620] | 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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[1627] | 397 | /// of undirected edges in a graph \c g of type \c Graph as follows: |
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[1620] | 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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[1627] | 405 | |
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[1620] | 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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[1627] | 410 | |
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[1620] | 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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[1030] | 415 | |
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[1620] | 416 | /// Initialize the iterator to be invalid. |
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| 417 | /// |
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| 418 | UndirEdgeIt(Invalid) { } |
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[1627] | 419 | /// This constructor sets the iterator to the first undirected edge. |
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[1620] | 420 | |
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[1627] | 421 | /// This constructor sets the iterator to the first undirected edge. |
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[1620] | 422 | UndirEdgeIt(const UndirGraph&) { } |
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| 423 | /// UndirEdge -> UndirEdgeIt conversion |
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[1030] | 424 | |
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[1627] | 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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[1620] | 429 | UndirEdgeIt(const UndirGraph&, const UndirEdge&) { } |
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[1627] | 430 | /// Next undirected edge |
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[1620] | 431 | |
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[1627] | 432 | /// Assign the iterator to the next undirected edge. |
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[1620] | 433 | UndirEdgeIt& operator++() { return *this; } |
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| 434 | }; |
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[1030] | 435 | |
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[1627] | 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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[1620] | 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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[1030] | 453 | |
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[1620] | 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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[1627] | 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 |
---|
| 509 | /// same object or both are invalid. |
---|
| 510 | bool operator==(Edge) const { return true; } |
---|
| 511 | /// Inequality operator |
---|
| 512 | |
---|
| 513 | /// \sa operator==(Edge n) |
---|
| 514 | /// |
---|
| 515 | bool operator!=(Edge) const { return true; } |
---|
| 516 | |
---|
| 517 | /// Artificial ordering operator. |
---|
| 518 | |
---|
| 519 | /// To allow the use of graph descriptors as key type in std::map or |
---|
| 520 | /// similar associative container we require this. |
---|
| 521 | /// |
---|
| 522 | /// \note This operator only have to define some strict ordering of |
---|
| 523 | /// the items; this order has nothing to do with the iteration |
---|
| 524 | /// ordering of the items. |
---|
| 525 | /// |
---|
| 526 | /// \bug This is a technical requirement. Do we really need this? |
---|
| 527 | bool operator<(Edge) const { return false; } |
---|
| 528 | |
---|
| 529 | }; |
---|
| 530 | /// This iterator goes through each directed edge. |
---|
| 531 | |
---|
| 532 | /// This iterator goes through each edge of a graph. |
---|
| 533 | /// Its usage is quite simple, for example you can count the number |
---|
| 534 | /// of edges in a graph \c g of type \c Graph as follows: |
---|
| 535 | /// \code |
---|
| 536 | /// int count=0; |
---|
| 537 | /// for(Graph::EdgeIt e(g); e!=INVALID; ++e) ++count; |
---|
| 538 | /// \endcode |
---|
| 539 | class EdgeIt : public Edge { |
---|
| 540 | public: |
---|
| 541 | /// Default constructor |
---|
| 542 | |
---|
| 543 | /// @warning The default constructor sets the iterator |
---|
| 544 | /// to an undefined value. |
---|
| 545 | EdgeIt() { } |
---|
| 546 | /// Copy constructor. |
---|
| 547 | |
---|
| 548 | /// Copy constructor. |
---|
| 549 | /// |
---|
| 550 | EdgeIt(const EdgeIt& e) : Edge(e) { } |
---|
| 551 | /// Initialize the iterator to be invalid. |
---|
| 552 | |
---|
| 553 | /// Initialize the iterator to be invalid. |
---|
| 554 | /// |
---|
| 555 | EdgeIt(Invalid) { } |
---|
| 556 | /// This constructor sets the iterator to the first edge. |
---|
| 557 | |
---|
| 558 | /// This constructor sets the iterator to the first edge of \c g. |
---|
| 559 | ///@param g the graph |
---|
| 560 | EdgeIt(const UndirGraph&) { } |
---|
| 561 | /// Edge -> EdgeIt conversion |
---|
| 562 | |
---|
| 563 | /// Sets the iterator to the value of the trivial iterator \c e. |
---|
| 564 | /// This feature necessitates that each time we |
---|
| 565 | /// iterate the edge-set, the iteration order is the same. |
---|
| 566 | EdgeIt(const UndirGraph&, const Edge&) { } |
---|
| 567 | ///Next edge |
---|
| 568 | |
---|
| 569 | /// Assign the iterator to the next edge. |
---|
| 570 | EdgeIt& operator++() { return *this; } |
---|
| 571 | }; |
---|
| 572 | |
---|
| 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 | |
---|
[1620] | 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 | { |
---|
[1030] | 725 | public: |
---|
| 726 | |
---|
[1620] | 727 | ///\e |
---|
| 728 | UndirEdgeMap(const UndirGraph&) { } |
---|
| 729 | ///\e |
---|
| 730 | UndirEdgeMap(const UndirGraph&, T) { } |
---|
| 731 | ///Copy constructor |
---|
[1627] | 732 | UndirEdgeMap(const UndirEdgeMap& em) : ReadWriteMap<UndirEdge,T>(em) {} |
---|
[1620] | 733 | ///Assignment operator |
---|
| 734 | UndirEdgeMap &operator=(const UndirEdgeMap&) { return *this; } |
---|
| 735 | // \todo fix this concept |
---|
[1030] | 736 | }; |
---|
| 737 | |
---|
[1627] | 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 | } |
---|
[1030] | 745 | |
---|
[1627] | 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 | /// |
---|
[1030] | 757 | /// Returns whether the given directed edge is same orientation as |
---|
| 758 | /// the corresponding undirected edge. |
---|
[1627] | 759 | bool direction(Edge) const { return true; } |
---|
| 760 | |
---|
| 761 | /// \brief Returns the opposite directed edge. |
---|
[1030] | 762 | /// |
---|
[1627] | 763 | /// Returns the opposite directed edge. |
---|
| 764 | Edge oppositeEdge(Edge) const { return INVALID; } |
---|
[1030] | 765 | |
---|
[1627] | 766 | /// \brief Opposite node on an edge |
---|
| 767 | /// |
---|
[1030] | 768 | /// \return the opposite of the given Node on the given Edge |
---|
| 769 | Node oppositeNode(Node, UndirEdge) const { return INVALID; } |
---|
| 770 | |
---|
[1627] | 771 | /// \brief First node of the undirected edge. |
---|
| 772 | /// |
---|
[1030] | 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 |
---|
[1627] | 779 | /// undirected edge, and is used to define the "default" direction |
---|
[1030] | 780 | /// of the directed versions of the edges. |
---|
[1627] | 781 | /// \sa direction |
---|
[1030] | 782 | Node source(UndirEdge) const { return INVALID; } |
---|
| 783 | |
---|
[1627] | 784 | /// \brief Second node of the undirected edge. |
---|
[1030] | 785 | Node target(UndirEdge) const { return INVALID; } |
---|
| 786 | |
---|
[1627] | 787 | /// \brief Source node of the directed edge. |
---|
[1030] | 788 | Node source(Edge) const { return INVALID; } |
---|
| 789 | |
---|
[1627] | 790 | /// \brief Target node of the directed edge. |
---|
[1030] | 791 | Node target(Edge) const { return INVALID; } |
---|
| 792 | |
---|
[1627] | 793 | /// \brief First node of the graph |
---|
| 794 | /// |
---|
[1030] | 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 {} |
---|
[1627] | 799 | /// \brief Next node of the graph |
---|
| 800 | /// |
---|
[1030] | 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 | |
---|
[1627] | 806 | /// \brief First undirected edge of the graph |
---|
| 807 | /// |
---|
[1030] | 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 {} |
---|
[1627] | 812 | /// \brief Next undirected edge of the graph |
---|
| 813 | /// |
---|
[1030] | 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 | |
---|
[1627] | 819 | /// \brief First directed edge of the graph |
---|
| 820 | /// |
---|
[1030] | 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 {} |
---|
[1627] | 825 | /// \brief Next directed edge of the graph |
---|
| 826 | /// |
---|
[1030] | 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 | |
---|
[1627] | 832 | /// \brief First outgoing edge from a given node |
---|
| 833 | /// |
---|
[1030] | 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 {} |
---|
[1627] | 838 | /// \brief Next outgoing edge to a node |
---|
| 839 | /// |
---|
[1030] | 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 | |
---|
[1627] | 845 | /// \brief First incoming edge to a given node |
---|
| 846 | /// |
---|
[1030] | 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 {} |
---|
[1627] | 851 | /// \brief Next incoming edge to a node |
---|
| 852 | /// |
---|
[1030] | 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 | |
---|
[1627] | 859 | /// \brief Base node of the iterator |
---|
[1158] | 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 | } |
---|
[1627] | 865 | /// \brief Running node of the iterator |
---|
[1158] | 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 | |
---|
[1627] | 873 | /// \brief Base node of the iterator |
---|
[1158] | 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 | } |
---|
[1627] | 879 | /// \brief Running node of the iterator |
---|
[1158] | 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 | |
---|
[1627] | 887 | /// \brief Base node of the iterator |
---|
[1158] | 888 | /// |
---|
| 889 | /// Returns the base node of the iterator |
---|
[1367] | 890 | Node baseNode(IncEdgeIt) const { |
---|
[1158] | 891 | return INVALID; |
---|
| 892 | } |
---|
[1627] | 893 | |
---|
| 894 | /// \brief Running node of the iterator |
---|
[1158] | 895 | /// |
---|
| 896 | /// Returns the running node of the iterator |
---|
[1367] | 897 | Node runningNode(IncEdgeIt) const { |
---|
[1158] | 898 | return INVALID; |
---|
| 899 | } |
---|
| 900 | |
---|
[1022] | 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 | |
---|
[1627] | 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. |
---|
[1022] | 916 | class ExtendableUndirGraph : public UndirGraph { |
---|
| 917 | public: |
---|
[1627] | 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() { } |
---|
[1022] | 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 | |
---|
[1627] | 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. |
---|
[1022] | 956 | class ErasableUndirGraph : public ExtendableUndirGraph { |
---|
| 957 | public: |
---|
| 958 | |
---|
[1627] | 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 | |
---|
[1022] | 970 | template <typename Graph> |
---|
| 971 | struct Constraints { |
---|
| 972 | void constraints() { |
---|
| 973 | checkConcept<ExtendableUndirGraph, Graph>(); |
---|
| 974 | checkConcept<ErasableUndirGraphConcept, Graph>(); |
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| 975 | } |
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| 976 | }; |
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| 977 | |
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[962] | 978 | }; |
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| 979 | |
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[1030] | 980 | /// @} |
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| 981 | |
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[962] | 982 | } |
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| 983 | |
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| 984 | } |
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| 985 | |
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| 986 | #endif |
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