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violations.hpp
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37 
38 #include <climits>
39 #include <cmath>
40 
41 namespace Gecode { namespace Int { namespace Sequence {
42 
45  protected:
47  mutable unsigned int fst;
48  public:
50  Violations(void);
52  void init(Space& home, unsigned int n);
54  void update(Space& home, bool shared, Violations& v);
56  bool empty(void) const;
58  void add(unsigned int i);
60  unsigned int get(void);
61  };
62 
63 
65  Violations::Violations(void) : fst(0) {}
66 
67  forceinline void
68  Violations::init(Space& home, unsigned int n) {
70  fst=size();
71  }
72 
73  forceinline bool
74  Violations::empty(void) const {
75  fst = next(fst);
76  return fst >= size();
77  }
78 
79  forceinline void
81  assert(v.empty());
82  init(home,v.size());
83  }
84 
85  forceinline void
86  Violations::add(unsigned int i) {
87  set(i); if (i < fst) fst = i;
88  }
89 
90  forceinline unsigned int
92  assert(!empty());
93  fst = next(fst);
95  clear(fst); fst++;
96  return fst-1;
97  }
98 
99 }}}
100 
101 // STATISTICS: int-prop
bool get(unsigned int i) const
Access value at bit i.
unsigned int fst
The (possibly) first set bit (set is empty if fst == sz)
Definition: violations.hpp:47
void clear(unsigned int i)
Clear bit i.
Basic bitset support.
Computation spaces.
Definition: core.hpp:1362
unsigned int get(void)
Get first element from violation set and remove it.
Definition: violations.hpp:91
Gecode::IntArgs i(4, 1, 2, 3, 4)
int n
Number of negative literals for node type.
Definition: bool-expr.cpp:238
Simple bitsets for recording violations.
Definition: violations.hpp:44
void init(A &a, unsigned int s, bool setbits=false)
Initialize for s bits and allocator a (only after default constructor)
void set(unsigned int i)
Set bit i.
void init(Space &home, unsigned int n)
Initialize violation set for n violations.
Definition: violations.hpp:68
const int v[7]
Definition: distinct.cpp:207
void update(Space &home, bool shared, Violations &v)
Update violation set during cloning.
Definition: violations.hpp:80
bool empty(void) const
Return whether set is empty.
Definition: violations.hpp:74
unsigned int next(unsigned int i) const
Return position greater or equal i of next set bit (i is allowed to be equal to size) ...
#define forceinline
Definition: config.hpp:132
Violations(void)
Default constructor.
Definition: violations.hpp:65
unsigned int size(void) const
Return size of bitset (number of bits)
bool shared(const ConstView< ViewA > &, const ConstView< ViewB > &)
Test whether views share same variable.
Definition: view.hpp:662
Gecode toplevel namespace
void add(unsigned int i)
Add i to violation set.
Definition: violations.hpp:86