1 | /* -*- C++ -*- |
---|
2 | * |
---|
3 | * This file is a part of LEMON, a generic C++ optimization library |
---|
4 | * |
---|
5 | * Copyright (C) 2003-2006 |
---|
6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
---|
7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
---|
8 | * |
---|
9 | * Permission to use, modify and distribute this software is granted |
---|
10 | * provided that this copyright notice appears in all copies. For |
---|
11 | * precise terms see the accompanying LICENSE file. |
---|
12 | * |
---|
13 | * This software is provided "AS IS" with no warranty of any kind, |
---|
14 | * express or implied, and with no claim as to its suitability for any |
---|
15 | * purpose. |
---|
16 | * |
---|
17 | */ |
---|
18 | |
---|
19 | #ifndef LEMON_CONCEPT_GRAPH_H |
---|
20 | #define LEMON_CONCEPT_GRAPH_H |
---|
21 | |
---|
22 | ///\ingroup graph_concepts |
---|
23 | ///\file |
---|
24 | ///\brief Declaration of Graph. |
---|
25 | |
---|
26 | #include <lemon/bits/invalid.h> |
---|
27 | #include <lemon/bits/utility.h> |
---|
28 | #include <lemon/concept/maps.h> |
---|
29 | #include <lemon/concept_check.h> |
---|
30 | #include <lemon/concept/graph_components.h> |
---|
31 | |
---|
32 | namespace lemon { |
---|
33 | namespace concept { |
---|
34 | |
---|
35 | /// \addtogroup graph_concepts |
---|
36 | /// @{ |
---|
37 | |
---|
38 | /// The directed graph concept |
---|
39 | |
---|
40 | /// This class describes the \ref concept "concept" of the |
---|
41 | /// immutable directed graphs. |
---|
42 | /// |
---|
43 | /// Note that actual graph implementation like @ref ListGraph or |
---|
44 | /// @ref SmartGraph may have several additional functionality. |
---|
45 | /// |
---|
46 | /// \sa concept |
---|
47 | class Graph { |
---|
48 | private: |
---|
49 | ///Graphs are \e not copy constructible. Use GraphCopy() instead. |
---|
50 | |
---|
51 | ///Graphs are \e not copy constructible. Use GraphCopy() instead. |
---|
52 | /// |
---|
53 | Graph(const Graph &) {}; |
---|
54 | ///\brief Assignment of \ref Graph "Graph"s to another ones are |
---|
55 | ///\e not allowed. Use GraphCopy() instead. |
---|
56 | |
---|
57 | ///Assignment of \ref Graph "Graph"s to another ones are |
---|
58 | ///\e not allowed. Use GraphCopy() instead. |
---|
59 | |
---|
60 | void operator=(const Graph &) {} |
---|
61 | public: |
---|
62 | ///\e |
---|
63 | |
---|
64 | /// Defalult constructor. |
---|
65 | |
---|
66 | /// Defalult constructor. |
---|
67 | /// |
---|
68 | Graph() { } |
---|
69 | /// Class for identifying a node of the graph |
---|
70 | |
---|
71 | /// This class identifies a node of the graph. It also serves |
---|
72 | /// as a base class of the node iterators, |
---|
73 | /// thus they will convert to this type. |
---|
74 | class Node { |
---|
75 | public: |
---|
76 | /// Default constructor |
---|
77 | |
---|
78 | /// @warning The default constructor sets the iterator |
---|
79 | /// to an undefined value. |
---|
80 | Node() { } |
---|
81 | /// Copy constructor. |
---|
82 | |
---|
83 | /// Copy constructor. |
---|
84 | /// |
---|
85 | Node(const Node&) { } |
---|
86 | |
---|
87 | /// Invalid constructor \& conversion. |
---|
88 | |
---|
89 | /// This constructor initializes the iterator to be invalid. |
---|
90 | /// \sa Invalid for more details. |
---|
91 | Node(Invalid) { } |
---|
92 | /// Equality operator |
---|
93 | |
---|
94 | /// Two iterators are equal if and only if they point to the |
---|
95 | /// same object or both are invalid. |
---|
96 | bool operator==(Node) const { return true; } |
---|
97 | |
---|
98 | /// Inequality operator |
---|
99 | |
---|
100 | /// \sa operator==(Node n) |
---|
101 | /// |
---|
102 | bool operator!=(Node) const { return true; } |
---|
103 | |
---|
104 | /// Artificial ordering operator. |
---|
105 | |
---|
106 | /// To allow the use of graph descriptors as key type in std::map or |
---|
107 | /// similar associative container we require this. |
---|
108 | /// |
---|
109 | /// \note This operator only have to define some strict ordering of |
---|
110 | /// the items; this order has nothing to do with the iteration |
---|
111 | /// ordering of the items. |
---|
112 | bool operator<(Node) const { return false; } |
---|
113 | |
---|
114 | }; |
---|
115 | |
---|
116 | /// This iterator goes through each node. |
---|
117 | |
---|
118 | /// This iterator goes through each node. |
---|
119 | /// Its usage is quite simple, for example you can count the number |
---|
120 | /// of nodes in graph \c g of type \c Graph like this: |
---|
121 | ///\code |
---|
122 | /// int count=0; |
---|
123 | /// for (Graph::NodeIt n(g); n!=INVALID; ++n) ++count; |
---|
124 | ///\endcode |
---|
125 | class NodeIt : public Node { |
---|
126 | public: |
---|
127 | /// Default constructor |
---|
128 | |
---|
129 | /// @warning The default constructor sets the iterator |
---|
130 | /// to an undefined value. |
---|
131 | NodeIt() { } |
---|
132 | /// Copy constructor. |
---|
133 | |
---|
134 | /// Copy constructor. |
---|
135 | /// |
---|
136 | NodeIt(const NodeIt& n) : Node(n) { } |
---|
137 | /// Invalid constructor \& conversion. |
---|
138 | |
---|
139 | /// Initialize the iterator to be invalid. |
---|
140 | /// \sa Invalid for more details. |
---|
141 | NodeIt(Invalid) { } |
---|
142 | /// Sets the iterator to the first node. |
---|
143 | |
---|
144 | /// Sets the iterator to the first node of \c g. |
---|
145 | /// |
---|
146 | NodeIt(const Graph&) { } |
---|
147 | /// Node -> NodeIt conversion. |
---|
148 | |
---|
149 | /// Sets the iterator to the node of \c the graph pointed by |
---|
150 | /// the trivial iterator. |
---|
151 | /// This feature necessitates that each time we |
---|
152 | /// iterate the edge-set, the iteration order is the same. |
---|
153 | NodeIt(const Graph&, const Node&) { } |
---|
154 | /// Next node. |
---|
155 | |
---|
156 | /// Assign the iterator to the next node. |
---|
157 | /// |
---|
158 | NodeIt& operator++() { return *this; } |
---|
159 | }; |
---|
160 | |
---|
161 | |
---|
162 | /// Class for identifying an edge of the graph |
---|
163 | |
---|
164 | /// This class identifies an edge of the graph. It also serves |
---|
165 | /// as a base class of the edge iterators, |
---|
166 | /// thus they will convert to this type. |
---|
167 | class Edge { |
---|
168 | public: |
---|
169 | /// Default constructor |
---|
170 | |
---|
171 | /// @warning The default constructor sets the iterator |
---|
172 | /// to an undefined value. |
---|
173 | Edge() { } |
---|
174 | /// Copy constructor. |
---|
175 | |
---|
176 | /// Copy constructor. |
---|
177 | /// |
---|
178 | Edge(const Edge&) { } |
---|
179 | /// Initialize the iterator to be invalid. |
---|
180 | |
---|
181 | /// Initialize the iterator to be invalid. |
---|
182 | /// |
---|
183 | Edge(Invalid) { } |
---|
184 | /// Equality operator |
---|
185 | |
---|
186 | /// Two iterators are equal if and only if they point to the |
---|
187 | /// same object or both are invalid. |
---|
188 | bool operator==(Edge) const { return true; } |
---|
189 | /// Inequality operator |
---|
190 | |
---|
191 | /// \sa operator==(Edge n) |
---|
192 | /// |
---|
193 | bool operator!=(Edge) const { return true; } |
---|
194 | |
---|
195 | /// Artificial ordering operator. |
---|
196 | |
---|
197 | /// To allow the use of graph descriptors as key type in std::map or |
---|
198 | /// similar associative container we require this. |
---|
199 | /// |
---|
200 | /// \note This operator only have to define some strict ordering of |
---|
201 | /// the items; this order has nothing to do with the iteration |
---|
202 | /// ordering of the items. |
---|
203 | bool operator<(Edge) const { return false; } |
---|
204 | }; |
---|
205 | |
---|
206 | /// This iterator goes trough the outgoing edges of a node. |
---|
207 | |
---|
208 | /// This iterator goes trough the \e outgoing edges of a certain node |
---|
209 | /// of a graph. |
---|
210 | /// Its usage is quite simple, for example you can count the number |
---|
211 | /// of outgoing edges of a node \c n |
---|
212 | /// in graph \c g of type \c Graph as follows. |
---|
213 | ///\code |
---|
214 | /// int count=0; |
---|
215 | /// for (Graph::OutEdgeIt e(g, n); e!=INVALID; ++e) ++count; |
---|
216 | ///\endcode |
---|
217 | |
---|
218 | class OutEdgeIt : public Edge { |
---|
219 | public: |
---|
220 | /// Default constructor |
---|
221 | |
---|
222 | /// @warning The default constructor sets the iterator |
---|
223 | /// to an undefined value. |
---|
224 | OutEdgeIt() { } |
---|
225 | /// Copy constructor. |
---|
226 | |
---|
227 | /// Copy constructor. |
---|
228 | /// |
---|
229 | OutEdgeIt(const OutEdgeIt& e) : Edge(e) { } |
---|
230 | /// Initialize the iterator to be invalid. |
---|
231 | |
---|
232 | /// Initialize the iterator to be invalid. |
---|
233 | /// |
---|
234 | OutEdgeIt(Invalid) { } |
---|
235 | /// This constructor sets the iterator to the first outgoing edge. |
---|
236 | |
---|
237 | /// This constructor sets the iterator to the first outgoing edge of |
---|
238 | /// the node. |
---|
239 | OutEdgeIt(const Graph&, const Node&) { } |
---|
240 | /// Edge -> OutEdgeIt conversion |
---|
241 | |
---|
242 | /// Sets the iterator to the value of the trivial iterator. |
---|
243 | /// This feature necessitates that each time we |
---|
244 | /// iterate the edge-set, the iteration order is the same. |
---|
245 | OutEdgeIt(const Graph&, const Edge&) { } |
---|
246 | ///Next outgoing edge |
---|
247 | |
---|
248 | /// Assign the iterator to the next |
---|
249 | /// outgoing edge of the corresponding node. |
---|
250 | OutEdgeIt& operator++() { return *this; } |
---|
251 | }; |
---|
252 | |
---|
253 | /// This iterator goes trough the incoming edges of a node. |
---|
254 | |
---|
255 | /// This iterator goes trough the \e incoming edges of a certain node |
---|
256 | /// of a graph. |
---|
257 | /// Its usage is quite simple, for example you can count the number |
---|
258 | /// of outgoing edges of a node \c n |
---|
259 | /// in graph \c g of type \c Graph as follows. |
---|
260 | ///\code |
---|
261 | /// int count=0; |
---|
262 | /// for(Graph::InEdgeIt e(g, n); e!=INVALID; ++e) ++count; |
---|
263 | ///\endcode |
---|
264 | |
---|
265 | class InEdgeIt : public Edge { |
---|
266 | public: |
---|
267 | /// Default constructor |
---|
268 | |
---|
269 | /// @warning The default constructor sets the iterator |
---|
270 | /// to an undefined value. |
---|
271 | InEdgeIt() { } |
---|
272 | /// Copy constructor. |
---|
273 | |
---|
274 | /// Copy constructor. |
---|
275 | /// |
---|
276 | InEdgeIt(const InEdgeIt& e) : Edge(e) { } |
---|
277 | /// Initialize the iterator to be invalid. |
---|
278 | |
---|
279 | /// Initialize the iterator to be invalid. |
---|
280 | /// |
---|
281 | InEdgeIt(Invalid) { } |
---|
282 | /// This constructor sets the iterator to first incoming edge. |
---|
283 | |
---|
284 | /// This constructor set the iterator to the first incoming edge of |
---|
285 | /// the node. |
---|
286 | InEdgeIt(const Graph&, const Node&) { } |
---|
287 | /// Edge -> InEdgeIt conversion |
---|
288 | |
---|
289 | /// Sets the iterator to the value of the trivial iterator \c e. |
---|
290 | /// This feature necessitates that each time we |
---|
291 | /// iterate the edge-set, the iteration order is the same. |
---|
292 | InEdgeIt(const Graph&, const Edge&) { } |
---|
293 | /// Next incoming edge |
---|
294 | |
---|
295 | /// Assign the iterator to the next inedge of the corresponding node. |
---|
296 | /// |
---|
297 | InEdgeIt& operator++() { return *this; } |
---|
298 | }; |
---|
299 | /// This iterator goes through each edge. |
---|
300 | |
---|
301 | /// This iterator goes through each edge of a graph. |
---|
302 | /// Its usage is quite simple, for example you can count the number |
---|
303 | /// of edges in a graph \c g of type \c Graph as follows: |
---|
304 | ///\code |
---|
305 | /// int count=0; |
---|
306 | /// for(Graph::EdgeIt e(g); e!=INVALID; ++e) ++count; |
---|
307 | ///\endcode |
---|
308 | class EdgeIt : public Edge { |
---|
309 | public: |
---|
310 | /// Default constructor |
---|
311 | |
---|
312 | /// @warning The default constructor sets the iterator |
---|
313 | /// to an undefined value. |
---|
314 | EdgeIt() { } |
---|
315 | /// Copy constructor. |
---|
316 | |
---|
317 | /// Copy constructor. |
---|
318 | /// |
---|
319 | EdgeIt(const EdgeIt& e) : Edge(e) { } |
---|
320 | /// Initialize the iterator to be invalid. |
---|
321 | |
---|
322 | /// Initialize the iterator to be invalid. |
---|
323 | /// |
---|
324 | EdgeIt(Invalid) { } |
---|
325 | /// This constructor sets the iterator to the first edge. |
---|
326 | |
---|
327 | /// This constructor sets the iterator to the first edge of \c g. |
---|
328 | ///@param g the graph |
---|
329 | EdgeIt(const Graph& g) { ignore_unused_variable_warning(g); } |
---|
330 | /// Edge -> EdgeIt conversion |
---|
331 | |
---|
332 | /// Sets the iterator to the value of the trivial iterator \c e. |
---|
333 | /// This feature necessitates that each time we |
---|
334 | /// iterate the edge-set, the iteration order is the same. |
---|
335 | EdgeIt(const Graph&, const Edge&) { } |
---|
336 | ///Next edge |
---|
337 | |
---|
338 | /// Assign the iterator to the next edge. |
---|
339 | EdgeIt& operator++() { return *this; } |
---|
340 | }; |
---|
341 | ///Gives back the target node of an edge. |
---|
342 | |
---|
343 | ///Gives back the target node of an edge. |
---|
344 | /// |
---|
345 | Node target(Edge) const { return INVALID; } |
---|
346 | ///Gives back the source node of an edge. |
---|
347 | |
---|
348 | ///Gives back the source node of an edge. |
---|
349 | /// |
---|
350 | Node source(Edge) const { return INVALID; } |
---|
351 | |
---|
352 | void first(Node&) const {} |
---|
353 | void next(Node&) const {} |
---|
354 | |
---|
355 | void first(Edge&) const {} |
---|
356 | void next(Edge&) const {} |
---|
357 | |
---|
358 | |
---|
359 | void firstIn(Edge&, const Node&) const {} |
---|
360 | void nextIn(Edge&) const {} |
---|
361 | |
---|
362 | void firstOut(Edge&, const Node&) const {} |
---|
363 | void nextOut(Edge&) const {} |
---|
364 | |
---|
365 | /// \brief The base node of the iterator. |
---|
366 | /// |
---|
367 | /// Gives back the base node of the iterator. |
---|
368 | /// It is always the target of the pointed edge. |
---|
369 | Node baseNode(const InEdgeIt&) const { return INVALID; } |
---|
370 | |
---|
371 | /// \brief The running node of the iterator. |
---|
372 | /// |
---|
373 | /// Gives back the running node of the iterator. |
---|
374 | /// It is always the source of the pointed edge. |
---|
375 | Node runningNode(const InEdgeIt&) const { return INVALID; } |
---|
376 | |
---|
377 | /// \brief The base node of the iterator. |
---|
378 | /// |
---|
379 | /// Gives back the base node of the iterator. |
---|
380 | /// It is always the source of the pointed edge. |
---|
381 | Node baseNode(const OutEdgeIt&) const { return INVALID; } |
---|
382 | |
---|
383 | /// \brief The running node of the iterator. |
---|
384 | /// |
---|
385 | /// Gives back the running node of the iterator. |
---|
386 | /// It is always the target of the pointed edge. |
---|
387 | Node runningNode(const OutEdgeIt&) const { return INVALID; } |
---|
388 | |
---|
389 | /// \brief The opposite node on the given edge. |
---|
390 | /// |
---|
391 | /// Gives back the opposite node on the given edge. |
---|
392 | Node oppositeNode(const Node&, const Edge&) const { return INVALID; } |
---|
393 | |
---|
394 | /// \brief Read write map of the nodes to type \c T. |
---|
395 | /// |
---|
396 | /// ReadWrite map of the nodes to type \c T. |
---|
397 | /// \sa Reference |
---|
398 | template<class T> |
---|
399 | class NodeMap : public ReadWriteMap< Node, T > { |
---|
400 | public: |
---|
401 | |
---|
402 | ///\e |
---|
403 | NodeMap(const Graph&) { } |
---|
404 | ///\e |
---|
405 | NodeMap(const Graph&, T) { } |
---|
406 | |
---|
407 | ///Copy constructor |
---|
408 | NodeMap(const NodeMap& nm) : ReadWriteMap< Node, T >(nm) { } |
---|
409 | ///Assignment operator |
---|
410 | template <typename CMap> |
---|
411 | NodeMap& operator=(const CMap&) { |
---|
412 | checkConcept<ReadMap<Node, T>, CMap>(); |
---|
413 | return *this; |
---|
414 | } |
---|
415 | }; |
---|
416 | |
---|
417 | /// \brief Read write map of the edges to type \c T. |
---|
418 | /// |
---|
419 | /// Reference map of the edges to type \c T. |
---|
420 | /// \sa Reference |
---|
421 | template<class T> |
---|
422 | class EdgeMap : public ReadWriteMap<Edge,T> { |
---|
423 | public: |
---|
424 | |
---|
425 | ///\e |
---|
426 | EdgeMap(const Graph&) { } |
---|
427 | ///\e |
---|
428 | EdgeMap(const Graph&, T) { } |
---|
429 | ///Copy constructor |
---|
430 | EdgeMap(const EdgeMap& em) : ReadWriteMap<Edge,T>(em) { } |
---|
431 | ///Assignment operator |
---|
432 | template <typename CMap> |
---|
433 | EdgeMap& operator=(const CMap&) { |
---|
434 | checkConcept<ReadMap<Edge, T>, CMap>(); |
---|
435 | return *this; |
---|
436 | } |
---|
437 | }; |
---|
438 | |
---|
439 | template <typename RGraph> |
---|
440 | struct Constraints { |
---|
441 | void constraints() { |
---|
442 | checkConcept<BaseIterableGraphComponent<>, Graph>(); |
---|
443 | checkConcept<IterableGraphComponent<>, Graph>(); |
---|
444 | checkConcept<MappableGraphComponent<>, Graph>(); |
---|
445 | } |
---|
446 | }; |
---|
447 | |
---|
448 | }; |
---|
449 | |
---|
450 | // @} |
---|
451 | } //namespace concept |
---|
452 | } //namespace lemon |
---|
453 | |
---|
454 | |
---|
455 | |
---|
456 | #endif // LEMON_CONCEPT_GRAPH_H |
---|