1 | // -*- c++ -*- |
---|
2 | #ifndef LEMON_ITERABLE_GRAPH_EXTENDER_H |
---|
3 | #define LEMON_ITERABLE_GRAPH_EXTENDER_H |
---|
4 | |
---|
5 | #include <lemon/invalid.h> |
---|
6 | |
---|
7 | namespace lemon { |
---|
8 | |
---|
9 | template <typename _Base> |
---|
10 | class IterableGraphExtender : public _Base { |
---|
11 | public: |
---|
12 | |
---|
13 | typedef _Base Parent; |
---|
14 | typedef IterableGraphExtender<_Base> Graph; |
---|
15 | |
---|
16 | typedef typename Parent::Node Node; |
---|
17 | typedef typename Parent::Edge Edge; |
---|
18 | |
---|
19 | |
---|
20 | class NodeIt : public Node { |
---|
21 | const Graph* graph; |
---|
22 | public: |
---|
23 | |
---|
24 | NodeIt() {} |
---|
25 | |
---|
26 | NodeIt(Invalid i) : Node(i) { } |
---|
27 | |
---|
28 | explicit NodeIt(const Graph& _graph) : graph(&_graph) { |
---|
29 | _graph.first(*static_cast<Node*>(this)); |
---|
30 | } |
---|
31 | |
---|
32 | NodeIt(const Graph& _graph, const Node& node) |
---|
33 | : Node(node), graph(&_graph) {} |
---|
34 | |
---|
35 | NodeIt& operator++() { |
---|
36 | graph->next(*this); |
---|
37 | return *this; |
---|
38 | } |
---|
39 | |
---|
40 | }; |
---|
41 | |
---|
42 | |
---|
43 | class EdgeIt : public Edge { |
---|
44 | const Graph* graph; |
---|
45 | public: |
---|
46 | |
---|
47 | EdgeIt() { } |
---|
48 | |
---|
49 | EdgeIt(Invalid i) : Edge(i) { } |
---|
50 | |
---|
51 | explicit EdgeIt(const Graph& _graph) : graph(&_graph) { |
---|
52 | _graph.first(*static_cast<Edge*>(this)); |
---|
53 | } |
---|
54 | |
---|
55 | EdgeIt(const Graph& _graph, const Edge& e) : |
---|
56 | Edge(e), graph(&_graph) { } |
---|
57 | |
---|
58 | EdgeIt& operator++() { |
---|
59 | graph->next(*this); |
---|
60 | return *this; |
---|
61 | } |
---|
62 | |
---|
63 | }; |
---|
64 | |
---|
65 | |
---|
66 | class OutEdgeIt : public Edge { |
---|
67 | const Graph* graph; |
---|
68 | public: |
---|
69 | |
---|
70 | OutEdgeIt() { } |
---|
71 | |
---|
72 | OutEdgeIt(Invalid i) : Edge(i) { } |
---|
73 | |
---|
74 | OutEdgeIt(const Graph& _graph, const Node& node) |
---|
75 | : graph(&_graph) { |
---|
76 | _graph.firstOut(*this, node); |
---|
77 | } |
---|
78 | |
---|
79 | OutEdgeIt(const Graph& _graph, const Edge& edge) |
---|
80 | : Edge(edge), graph(&_graph) {} |
---|
81 | |
---|
82 | OutEdgeIt& operator++() { |
---|
83 | graph->nextOut(*this); |
---|
84 | return *this; |
---|
85 | } |
---|
86 | |
---|
87 | }; |
---|
88 | |
---|
89 | |
---|
90 | class InEdgeIt : public Edge { |
---|
91 | const Graph* graph; |
---|
92 | public: |
---|
93 | |
---|
94 | InEdgeIt() { } |
---|
95 | |
---|
96 | InEdgeIt(Invalid i) : Edge(i) { } |
---|
97 | |
---|
98 | InEdgeIt(const Graph& _graph, const Node& node) |
---|
99 | : graph(&_graph) { |
---|
100 | _graph.firstIn(*this, node); |
---|
101 | } |
---|
102 | |
---|
103 | InEdgeIt(const Graph& _graph, const Edge& edge) : |
---|
104 | Edge(edge), graph(&_graph) {} |
---|
105 | |
---|
106 | InEdgeIt& operator++() { |
---|
107 | graph->nextIn(*this); |
---|
108 | return *this; |
---|
109 | } |
---|
110 | |
---|
111 | }; |
---|
112 | |
---|
113 | using Parent::first; |
---|
114 | |
---|
115 | private: |
---|
116 | |
---|
117 | /// \todo When (and if) we change the iterators concept to use operator*, |
---|
118 | /// then the following shadowed methods will become superfluous. |
---|
119 | /// But for now these are important safety measures. |
---|
120 | |
---|
121 | void first(NodeIt &) const; |
---|
122 | void first(EdgeIt &) const; |
---|
123 | void first(OutEdgeIt &) const; |
---|
124 | void first(InEdgeIt &) const; |
---|
125 | |
---|
126 | }; |
---|
127 | |
---|
128 | template <typename _Base> |
---|
129 | class IterableUndirGraphExtender : public IterableGraphExtender<_Base> { |
---|
130 | public: |
---|
131 | |
---|
132 | typedef IterableGraphExtender<_Base> Parent; |
---|
133 | typedef IterableUndirGraphExtender<_Base> Graph; |
---|
134 | typedef typename Parent::Node Node; |
---|
135 | |
---|
136 | typedef typename Parent::UndirEdge UndirEdge; |
---|
137 | |
---|
138 | class UndirEdgeIt : public UndirEdge { |
---|
139 | const Graph* graph; |
---|
140 | public: |
---|
141 | |
---|
142 | UndirEdgeIt() { } |
---|
143 | |
---|
144 | UndirEdgeIt(Invalid i) : UndirEdge(i) { } |
---|
145 | |
---|
146 | explicit UndirEdgeIt(const Graph& _graph) : graph(&_graph) { |
---|
147 | _graph.first(*static_cast<UndirEdge*>(this)); |
---|
148 | } |
---|
149 | |
---|
150 | UndirEdgeIt(const Graph& _graph, const UndirEdge& e) : |
---|
151 | UndirEdge(e), graph(&_graph) { } |
---|
152 | |
---|
153 | UndirEdgeIt& operator++() { |
---|
154 | graph->next(*this); |
---|
155 | return *this; |
---|
156 | } |
---|
157 | |
---|
158 | }; |
---|
159 | |
---|
160 | class UndirIncEdgeIt : public UndirEdge { |
---|
161 | const Graph* graph; |
---|
162 | bool forward; |
---|
163 | friend class IterableUndirGraphExtender; |
---|
164 | template <typename G> |
---|
165 | friend class UndirGraphExtender; |
---|
166 | public: |
---|
167 | |
---|
168 | UndirIncEdgeIt() { } |
---|
169 | |
---|
170 | UndirIncEdgeIt(Invalid i) : UndirEdge(i), forward(false) { } |
---|
171 | |
---|
172 | explicit UndirIncEdgeIt(const Graph& _graph, const Node &n) |
---|
173 | : graph(&_graph) |
---|
174 | { |
---|
175 | _graph._dirFirstOut(*this, n); |
---|
176 | } |
---|
177 | |
---|
178 | // FIXME: Do we need this type of constructor here? |
---|
179 | // UndirIncEdgeIt(const Graph& _graph, const Edge& e) : |
---|
180 | // UndirEdge(e), graph(&_graph), forward(_graph.forward(e)) { } |
---|
181 | // or |
---|
182 | // UndirIncEdgeIt(const Graph& _graph, const Node& n, |
---|
183 | // Const UndirEdge &e) ... ? |
---|
184 | |
---|
185 | UndirIncEdgeIt& operator++() { |
---|
186 | graph->_dirNextOut(*this); |
---|
187 | return *this; |
---|
188 | } |
---|
189 | }; |
---|
190 | |
---|
191 | Node source(const UndirIncEdgeIt &e) const { |
---|
192 | return _dirSource(e); |
---|
193 | } |
---|
194 | |
---|
195 | /// \todo Shouldn't the "source" of an undirected edge be called "aNode" |
---|
196 | /// or something??? |
---|
197 | using Parent::source; |
---|
198 | |
---|
199 | /// Target of the given Edge. |
---|
200 | Node target(const UndirIncEdgeIt &e) const { |
---|
201 | return _dirTarget(e); |
---|
202 | } |
---|
203 | |
---|
204 | /// \todo Shouldn't the "target" of an undirected edge be called "bNode" |
---|
205 | /// or something??? |
---|
206 | using Parent::target; |
---|
207 | |
---|
208 | }; |
---|
209 | } |
---|
210 | |
---|
211 | #endif // LEMON_GRAPH_EXTENDER_H |
---|