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bab.hh
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1 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2 /*
3  * Main authors:
4  * Christian Schulte <schulte@gecode.org>
5  *
6  * Contributing authors:
7  * Guido Tack <tack@gecode.org>
8  *
9  * Copyright:
10  * Christian Schulte, 2004
11  * Guido Tack, 2004
12  *
13  * This file is part of Gecode, the generic constraint
14  * development environment:
15  * http://www.gecode.org
16  *
17  * Permission is hereby granted, free of charge, to any person obtaining
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22  * permit persons to whom the Software is furnished to do so, subject to
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37 
38 #ifndef __GECODE_SEARCH_SEQ_BAB_HH__
39 #define __GECODE_SEARCH_SEQ_BAB_HH__
40 
41 #include <gecode/search.hh>
42 #include <gecode/search/support.hh>
43 #include <gecode/search/worker.hh>
45 
46 namespace Gecode { namespace Search { namespace Seq {
47 
49  template<class Tracer>
50  class BAB : public Worker {
51  private:
53  Tracer tracer;
55  Options opt;
57  Path<Tracer> path;
59  Space* cur;
61  unsigned int d;
63  int mark;
65  Space* best;
66  public:
68  BAB(Space* s, const Options& o);
70  Space* next(void);
72  Statistics statistics(void) const;
74  void constrain(const Space& b);
76  void reset(Space* s);
78  NoGoods& nogoods(void);
80  ~BAB(void);
81  };
82 
83 }}}
84 
86 
87 #endif
88 
89 // STATISTICS: search-seq
struct Gecode::@602::NNF::@65::@66 b
For binary nodes (and, or, eqv)
No-goods recorded from restarts.
Definition: core.hpp:1588
Search engine options
Definition: search.hh:746
Implementation of depth-first branch-and-bound search engine.
Definition: bab.hh:50
BAB(Space *s, const Options &o)
Initialize with space s and search options o.
Definition: bab.hpp:42
~BAB(void)
Destructor.
Definition: bab.hpp:203
NoGoods & nogoods(void)
Return no-goods.
Definition: bab.hpp:197
Space * next(void)
Search for next better solution
Definition: bab.hpp:61
void constrain(const Space &b)
Constrain future solutions to be better than b.
Definition: bab.hpp:161
Statistics statistics(void) const
Return statistics.
Definition: bab.hpp:155
Depth-first path (stack of edges) supporting recomputation.
Definition: path.hh:60
Search engine statistics
Definition: search.hh:147
void reset(void)
Reset.
Definition: statistics.hpp:39
Search worker statistics
Definition: worker.hh:44
Computation spaces.
Definition: core.hpp:1742
Tracer.
Definition: tracer.hpp:149