1 | /* -*- mode: C++; indent-tabs-mode: nil; -*- |
---|
2 | * |
---|
3 | * This file is a part of LEMON, a generic C++ optimization library. |
---|
4 | * |
---|
5 | * Copyright (C) 2003-2009 |
---|
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_DIGRAPH_H |
---|
20 | #define LEMON_CONCEPT_DIGRAPH_H |
---|
21 | |
---|
22 | ///\ingroup graph_concepts |
---|
23 | ///\file |
---|
24 | ///\brief The concept of directed graphs. |
---|
25 | |
---|
26 | #include <lemon/core.h> |
---|
27 | #include <lemon/concepts/maps.h> |
---|
28 | #include <lemon/concept_check.h> |
---|
29 | #include <lemon/concepts/graph_components.h> |
---|
30 | |
---|
31 | namespace lemon { |
---|
32 | namespace concepts { |
---|
33 | |
---|
34 | /// \ingroup graph_concepts |
---|
35 | /// |
---|
36 | /// \brief Class describing the concept of directed graphs. |
---|
37 | /// |
---|
38 | /// This class describes the \ref concept "concept" of the |
---|
39 | /// immutable directed digraphs. |
---|
40 | /// |
---|
41 | /// Note that actual digraph implementation like @ref ListDigraph or |
---|
42 | /// @ref SmartDigraph may have several additional functionality. |
---|
43 | /// |
---|
44 | /// \sa concept |
---|
45 | class Digraph { |
---|
46 | private: |
---|
47 | ///Digraphs are \e not copy constructible. Use DigraphCopy() instead. |
---|
48 | |
---|
49 | ///Digraphs are \e not copy constructible. Use DigraphCopy() instead. |
---|
50 | /// |
---|
51 | Digraph(const Digraph &) {}; |
---|
52 | ///\brief Assignment of \ref Digraph "Digraph"s to another ones are |
---|
53 | ///\e not allowed. Use DigraphCopy() instead. |
---|
54 | |
---|
55 | ///Assignment of \ref Digraph "Digraph"s to another ones are |
---|
56 | ///\e not allowed. Use DigraphCopy() instead. |
---|
57 | |
---|
58 | void operator=(const Digraph &) {} |
---|
59 | public: |
---|
60 | ///\e |
---|
61 | |
---|
62 | /// Defalult constructor. |
---|
63 | |
---|
64 | /// Defalult constructor. |
---|
65 | /// |
---|
66 | Digraph() { } |
---|
67 | /// Class for identifying a node of the digraph |
---|
68 | |
---|
69 | /// This class identifies a node of the digraph. It also serves |
---|
70 | /// as a base class of the node iterators, |
---|
71 | /// thus they will convert to this type. |
---|
72 | class Node { |
---|
73 | public: |
---|
74 | /// Default constructor |
---|
75 | |
---|
76 | /// @warning The default constructor sets the iterator |
---|
77 | /// to an undefined value. |
---|
78 | Node() { } |
---|
79 | /// Copy constructor. |
---|
80 | |
---|
81 | /// Copy constructor. |
---|
82 | /// |
---|
83 | Node(const Node&) { } |
---|
84 | |
---|
85 | /// Invalid constructor \& conversion. |
---|
86 | |
---|
87 | /// This constructor initializes the iterator to be invalid. |
---|
88 | /// \sa Invalid for more details. |
---|
89 | Node(Invalid) { } |
---|
90 | /// Equality operator |
---|
91 | |
---|
92 | /// Two iterators are equal if and only if they point to the |
---|
93 | /// same object or both are invalid. |
---|
94 | bool operator==(Node) const { return true; } |
---|
95 | |
---|
96 | /// Inequality operator |
---|
97 | |
---|
98 | /// \sa operator==(Node n) |
---|
99 | /// |
---|
100 | bool operator!=(Node) const { return true; } |
---|
101 | |
---|
102 | /// Artificial ordering operator. |
---|
103 | |
---|
104 | /// To allow the use of digraph descriptors as key type in std::map or |
---|
105 | /// similar associative container we require this. |
---|
106 | /// |
---|
107 | /// \note This operator only have to define some strict ordering of |
---|
108 | /// the items; this order has nothing to do with the iteration |
---|
109 | /// ordering of the items. |
---|
110 | bool operator<(Node) const { return false; } |
---|
111 | |
---|
112 | }; |
---|
113 | |
---|
114 | /// This iterator goes through each node. |
---|
115 | |
---|
116 | /// This iterator goes through each node. |
---|
117 | /// Its usage is quite simple, for example you can count the number |
---|
118 | /// of nodes in digraph \c g of type \c Digraph like this: |
---|
119 | ///\code |
---|
120 | /// int count=0; |
---|
121 | /// for (Digraph::NodeIt n(g); n!=INVALID; ++n) ++count; |
---|
122 | ///\endcode |
---|
123 | class NodeIt : public Node { |
---|
124 | public: |
---|
125 | /// Default constructor |
---|
126 | |
---|
127 | /// @warning The default constructor sets the iterator |
---|
128 | /// to an undefined value. |
---|
129 | NodeIt() { } |
---|
130 | /// Copy constructor. |
---|
131 | |
---|
132 | /// Copy constructor. |
---|
133 | /// |
---|
134 | NodeIt(const NodeIt& n) : Node(n) { } |
---|
135 | /// Invalid constructor \& conversion. |
---|
136 | |
---|
137 | /// Initialize the iterator to be invalid. |
---|
138 | /// \sa Invalid for more details. |
---|
139 | NodeIt(Invalid) { } |
---|
140 | /// Sets the iterator to the first node. |
---|
141 | |
---|
142 | /// Sets the iterator to the first node of \c g. |
---|
143 | /// |
---|
144 | NodeIt(const Digraph&) { } |
---|
145 | /// Node -> NodeIt conversion. |
---|
146 | |
---|
147 | /// Sets the iterator to the node of \c the digraph pointed by |
---|
148 | /// the trivial iterator. |
---|
149 | /// This feature necessitates that each time we |
---|
150 | /// iterate the arc-set, the iteration order is the same. |
---|
151 | NodeIt(const Digraph&, const Node&) { } |
---|
152 | /// Next node. |
---|
153 | |
---|
154 | /// Assign the iterator to the next node. |
---|
155 | /// |
---|
156 | NodeIt& operator++() { return *this; } |
---|
157 | }; |
---|
158 | |
---|
159 | |
---|
160 | /// Class for identifying an arc of the digraph |
---|
161 | |
---|
162 | /// This class identifies an arc of the digraph. It also serves |
---|
163 | /// as a base class of the arc iterators, |
---|
164 | /// thus they will convert to this type. |
---|
165 | class Arc { |
---|
166 | public: |
---|
167 | /// Default constructor |
---|
168 | |
---|
169 | /// @warning The default constructor sets the iterator |
---|
170 | /// to an undefined value. |
---|
171 | Arc() { } |
---|
172 | /// Copy constructor. |
---|
173 | |
---|
174 | /// Copy constructor. |
---|
175 | /// |
---|
176 | Arc(const Arc&) { } |
---|
177 | /// Initialize the iterator to be invalid. |
---|
178 | |
---|
179 | /// Initialize the iterator to be invalid. |
---|
180 | /// |
---|
181 | Arc(Invalid) { } |
---|
182 | /// Equality operator |
---|
183 | |
---|
184 | /// Two iterators are equal if and only if they point to the |
---|
185 | /// same object or both are invalid. |
---|
186 | bool operator==(Arc) const { return true; } |
---|
187 | /// Inequality operator |
---|
188 | |
---|
189 | /// \sa operator==(Arc n) |
---|
190 | /// |
---|
191 | bool operator!=(Arc) const { return true; } |
---|
192 | |
---|
193 | /// Artificial ordering operator. |
---|
194 | |
---|
195 | /// To allow the use of digraph descriptors as key type in std::map or |
---|
196 | /// similar associative container we require this. |
---|
197 | /// |
---|
198 | /// \note This operator only have to define some strict ordering of |
---|
199 | /// the items; this order has nothing to do with the iteration |
---|
200 | /// ordering of the items. |
---|
201 | bool operator<(Arc) const { return false; } |
---|
202 | }; |
---|
203 | |
---|
204 | /// This iterator goes trough the outgoing arcs of a node. |
---|
205 | |
---|
206 | /// This iterator goes trough the \e outgoing arcs of a certain node |
---|
207 | /// of a digraph. |
---|
208 | /// Its usage is quite simple, for example you can count the number |
---|
209 | /// of outgoing arcs of a node \c n |
---|
210 | /// in digraph \c g of type \c Digraph as follows. |
---|
211 | ///\code |
---|
212 | /// int count=0; |
---|
213 | /// for (Digraph::OutArcIt e(g, n); e!=INVALID; ++e) ++count; |
---|
214 | ///\endcode |
---|
215 | |
---|
216 | class OutArcIt : public Arc { |
---|
217 | public: |
---|
218 | /// Default constructor |
---|
219 | |
---|
220 | /// @warning The default constructor sets the iterator |
---|
221 | /// to an undefined value. |
---|
222 | OutArcIt() { } |
---|
223 | /// Copy constructor. |
---|
224 | |
---|
225 | /// Copy constructor. |
---|
226 | /// |
---|
227 | OutArcIt(const OutArcIt& e) : Arc(e) { } |
---|
228 | /// Initialize the iterator to be invalid. |
---|
229 | |
---|
230 | /// Initialize the iterator to be invalid. |
---|
231 | /// |
---|
232 | OutArcIt(Invalid) { } |
---|
233 | /// This constructor sets the iterator to the first outgoing arc. |
---|
234 | |
---|
235 | /// This constructor sets the iterator to the first outgoing arc of |
---|
236 | /// the node. |
---|
237 | OutArcIt(const Digraph&, const Node&) { } |
---|
238 | /// Arc -> OutArcIt conversion |
---|
239 | |
---|
240 | /// Sets the iterator to the value of the trivial iterator. |
---|
241 | /// This feature necessitates that each time we |
---|
242 | /// iterate the arc-set, the iteration order is the same. |
---|
243 | OutArcIt(const Digraph&, const Arc&) { } |
---|
244 | ///Next outgoing arc |
---|
245 | |
---|
246 | /// Assign the iterator to the next |
---|
247 | /// outgoing arc of the corresponding node. |
---|
248 | OutArcIt& operator++() { return *this; } |
---|
249 | }; |
---|
250 | |
---|
251 | /// This iterator goes trough the incoming arcs of a node. |
---|
252 | |
---|
253 | /// This iterator goes trough the \e incoming arcs of a certain node |
---|
254 | /// of a digraph. |
---|
255 | /// Its usage is quite simple, for example you can count the number |
---|
256 | /// of outgoing arcs of a node \c n |
---|
257 | /// in digraph \c g of type \c Digraph as follows. |
---|
258 | ///\code |
---|
259 | /// int count=0; |
---|
260 | /// for(Digraph::InArcIt e(g, n); e!=INVALID; ++e) ++count; |
---|
261 | ///\endcode |
---|
262 | |
---|
263 | class InArcIt : public Arc { |
---|
264 | public: |
---|
265 | /// Default constructor |
---|
266 | |
---|
267 | /// @warning The default constructor sets the iterator |
---|
268 | /// to an undefined value. |
---|
269 | InArcIt() { } |
---|
270 | /// Copy constructor. |
---|
271 | |
---|
272 | /// Copy constructor. |
---|
273 | /// |
---|
274 | InArcIt(const InArcIt& e) : Arc(e) { } |
---|
275 | /// Initialize the iterator to be invalid. |
---|
276 | |
---|
277 | /// Initialize the iterator to be invalid. |
---|
278 | /// |
---|
279 | InArcIt(Invalid) { } |
---|
280 | /// This constructor sets the iterator to first incoming arc. |
---|
281 | |
---|
282 | /// This constructor set the iterator to the first incoming arc of |
---|
283 | /// the node. |
---|
284 | InArcIt(const Digraph&, const Node&) { } |
---|
285 | /// Arc -> InArcIt conversion |
---|
286 | |
---|
287 | /// Sets the iterator to the value of the trivial iterator \c e. |
---|
288 | /// This feature necessitates that each time we |
---|
289 | /// iterate the arc-set, the iteration order is the same. |
---|
290 | InArcIt(const Digraph&, const Arc&) { } |
---|
291 | /// Next incoming arc |
---|
292 | |
---|
293 | /// Assign the iterator to the next inarc of the corresponding node. |
---|
294 | /// |
---|
295 | InArcIt& operator++() { return *this; } |
---|
296 | }; |
---|
297 | /// This iterator goes through each arc. |
---|
298 | |
---|
299 | /// This iterator goes through each arc of a digraph. |
---|
300 | /// Its usage is quite simple, for example you can count the number |
---|
301 | /// of arcs in a digraph \c g of type \c Digraph as follows: |
---|
302 | ///\code |
---|
303 | /// int count=0; |
---|
304 | /// for(Digraph::ArcIt e(g); e!=INVALID; ++e) ++count; |
---|
305 | ///\endcode |
---|
306 | class ArcIt : public Arc { |
---|
307 | public: |
---|
308 | /// Default constructor |
---|
309 | |
---|
310 | /// @warning The default constructor sets the iterator |
---|
311 | /// to an undefined value. |
---|
312 | ArcIt() { } |
---|
313 | /// Copy constructor. |
---|
314 | |
---|
315 | /// Copy constructor. |
---|
316 | /// |
---|
317 | ArcIt(const ArcIt& e) : Arc(e) { } |
---|
318 | /// Initialize the iterator to be invalid. |
---|
319 | |
---|
320 | /// Initialize the iterator to be invalid. |
---|
321 | /// |
---|
322 | ArcIt(Invalid) { } |
---|
323 | /// This constructor sets the iterator to the first arc. |
---|
324 | |
---|
325 | /// This constructor sets the iterator to the first arc of \c g. |
---|
326 | ///@param g the digraph |
---|
327 | ArcIt(const Digraph& g) { ignore_unused_variable_warning(g); } |
---|
328 | /// Arc -> ArcIt conversion |
---|
329 | |
---|
330 | /// Sets the iterator to the value of the trivial iterator \c e. |
---|
331 | /// This feature necessitates that each time we |
---|
332 | /// iterate the arc-set, the iteration order is the same. |
---|
333 | ArcIt(const Digraph&, const Arc&) { } |
---|
334 | ///Next arc |
---|
335 | |
---|
336 | /// Assign the iterator to the next arc. |
---|
337 | ArcIt& operator++() { return *this; } |
---|
338 | }; |
---|
339 | ///Gives back the target node of an arc. |
---|
340 | |
---|
341 | ///Gives back the target node of an arc. |
---|
342 | /// |
---|
343 | Node target(Arc) const { return INVALID; } |
---|
344 | ///Gives back the source node of an arc. |
---|
345 | |
---|
346 | ///Gives back the source node of an arc. |
---|
347 | /// |
---|
348 | Node source(Arc) const { return INVALID; } |
---|
349 | |
---|
350 | /// \brief Returns the ID of the node. |
---|
351 | int id(Node) const { return -1; } |
---|
352 | |
---|
353 | /// \brief Returns the ID of the arc. |
---|
354 | int id(Arc) const { return -1; } |
---|
355 | |
---|
356 | /// \brief Returns the node with the given ID. |
---|
357 | /// |
---|
358 | /// \pre The argument should be a valid node ID in the graph. |
---|
359 | Node nodeFromId(int) const { return INVALID; } |
---|
360 | |
---|
361 | /// \brief Returns the arc with the given ID. |
---|
362 | /// |
---|
363 | /// \pre The argument should be a valid arc ID in the graph. |
---|
364 | Arc arcFromId(int) const { return INVALID; } |
---|
365 | |
---|
366 | /// \brief Returns an upper bound on the node IDs. |
---|
367 | int maxNodeId() const { return -1; } |
---|
368 | |
---|
369 | /// \brief Returns an upper bound on the arc IDs. |
---|
370 | int maxArcId() const { return -1; } |
---|
371 | |
---|
372 | void first(Node&) const {} |
---|
373 | void next(Node&) const {} |
---|
374 | |
---|
375 | void first(Arc&) const {} |
---|
376 | void next(Arc&) const {} |
---|
377 | |
---|
378 | |
---|
379 | void firstIn(Arc&, const Node&) const {} |
---|
380 | void nextIn(Arc&) const {} |
---|
381 | |
---|
382 | void firstOut(Arc&, const Node&) const {} |
---|
383 | void nextOut(Arc&) const {} |
---|
384 | |
---|
385 | // The second parameter is dummy. |
---|
386 | Node fromId(int, Node) const { return INVALID; } |
---|
387 | // The second parameter is dummy. |
---|
388 | Arc fromId(int, Arc) const { return INVALID; } |
---|
389 | |
---|
390 | // Dummy parameter. |
---|
391 | int maxId(Node) const { return -1; } |
---|
392 | // Dummy parameter. |
---|
393 | int maxId(Arc) const { return -1; } |
---|
394 | |
---|
395 | /// \brief The base node of the iterator. |
---|
396 | /// |
---|
397 | /// Gives back the base node of the iterator. |
---|
398 | /// It is always the target of the pointed arc. |
---|
399 | Node baseNode(const InArcIt&) const { return INVALID; } |
---|
400 | |
---|
401 | /// \brief The running node of the iterator. |
---|
402 | /// |
---|
403 | /// Gives back the running node of the iterator. |
---|
404 | /// It is always the source of the pointed arc. |
---|
405 | Node runningNode(const InArcIt&) const { return INVALID; } |
---|
406 | |
---|
407 | /// \brief The base node of the iterator. |
---|
408 | /// |
---|
409 | /// Gives back the base node of the iterator. |
---|
410 | /// It is always the source of the pointed arc. |
---|
411 | Node baseNode(const OutArcIt&) const { return INVALID; } |
---|
412 | |
---|
413 | /// \brief The running node of the iterator. |
---|
414 | /// |
---|
415 | /// Gives back the running node of the iterator. |
---|
416 | /// It is always the target of the pointed arc. |
---|
417 | Node runningNode(const OutArcIt&) const { return INVALID; } |
---|
418 | |
---|
419 | /// \brief The opposite node on the given arc. |
---|
420 | /// |
---|
421 | /// Gives back the opposite node on the given arc. |
---|
422 | Node oppositeNode(const Node&, const Arc&) const { return INVALID; } |
---|
423 | |
---|
424 | /// \brief Read write map of the nodes to type \c T. |
---|
425 | /// |
---|
426 | /// ReadWrite map of the nodes to type \c T. |
---|
427 | /// \sa Reference |
---|
428 | template<class T> |
---|
429 | class NodeMap : public ReadWriteMap< Node, T > { |
---|
430 | public: |
---|
431 | |
---|
432 | ///\e |
---|
433 | NodeMap(const Digraph&) { } |
---|
434 | ///\e |
---|
435 | NodeMap(const Digraph&, T) { } |
---|
436 | |
---|
437 | private: |
---|
438 | ///Copy constructor |
---|
439 | NodeMap(const NodeMap& nm) : ReadWriteMap< Node, T >(nm) { } |
---|
440 | ///Assignment operator |
---|
441 | template <typename CMap> |
---|
442 | NodeMap& operator=(const CMap&) { |
---|
443 | checkConcept<ReadMap<Node, T>, CMap>(); |
---|
444 | return *this; |
---|
445 | } |
---|
446 | }; |
---|
447 | |
---|
448 | /// \brief Read write map of the arcs to type \c T. |
---|
449 | /// |
---|
450 | /// Reference map of the arcs to type \c T. |
---|
451 | /// \sa Reference |
---|
452 | template<class T> |
---|
453 | class ArcMap : public ReadWriteMap<Arc,T> { |
---|
454 | public: |
---|
455 | |
---|
456 | ///\e |
---|
457 | ArcMap(const Digraph&) { } |
---|
458 | ///\e |
---|
459 | ArcMap(const Digraph&, T) { } |
---|
460 | private: |
---|
461 | ///Copy constructor |
---|
462 | ArcMap(const ArcMap& em) : ReadWriteMap<Arc,T>(em) { } |
---|
463 | ///Assignment operator |
---|
464 | template <typename CMap> |
---|
465 | ArcMap& operator=(const CMap&) { |
---|
466 | checkConcept<ReadMap<Arc, T>, CMap>(); |
---|
467 | return *this; |
---|
468 | } |
---|
469 | }; |
---|
470 | |
---|
471 | template <typename _Digraph> |
---|
472 | struct Constraints { |
---|
473 | void constraints() { |
---|
474 | checkConcept<IterableDigraphComponent<>, _Digraph>(); |
---|
475 | checkConcept<IDableDigraphComponent<>, _Digraph>(); |
---|
476 | checkConcept<MappableDigraphComponent<>, _Digraph>(); |
---|
477 | } |
---|
478 | }; |
---|
479 | |
---|
480 | }; |
---|
481 | |
---|
482 | } //namespace concepts |
---|
483 | } //namespace lemon |
---|
484 | |
---|
485 | |
---|
486 | |
---|
487 | #endif // LEMON_CONCEPT_DIGRAPH_H |
---|