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precede.hh
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2 /*
3  * Main authors:
4  * Christopher Mears <Chris.Mears@monash.edu>
5  *
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7  * Christian Schulte <schulte@gecode.org>
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10  * Christopher Mears, 2011
11  * Christian Schulte, 2011
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37 
38 #ifndef __GECODE_INT_PRECEDE_HH__
39 #define __GECODE_INT_PRECEDE_HH__
40 
41 #include <gecode/int.hh>
42 
48 namespace Gecode { namespace Int { namespace Precede {
49 
60  template<class View>
61  class Single : public NaryPropagator<View,PC_INT_NONE> {
62  protected:
65  class Index : public Advisor {
66  public:
68  int i;
70  Index(Space& home, Propagator& p, Council<Index>& c, int i);
72  Index(Space& home, Index& a);
73  };
77  int s, t;
79  int alpha, beta, gamma;
85  Single(Home home, ViewArray<View>& x, int s, int t, int beta, int gamma);
87  Single(Space& home, Single<View>& p);
88  public:
90  virtual Propagator* copy(Space& home);
92  virtual PropCost cost(const Space&, const ModEventDelta&) const;
94  virtual void reschedule(Space& home);
96  virtual size_t dispose(Space& home);
98  virtual ExecStatus advise(Space& home, Advisor& a, const Delta& d);
100  virtual ExecStatus propagate(Space& home, const ModEventDelta& med);
102  static ExecStatus post(Home home, ViewArray<View>& x, int s, int t);
103  };
104 
105 }}}
106 
108 
109 #endif
110 
111 // STATISTICS: int-prop
virtual ExecStatus advise(Space &home, Advisor &a, const Delta &d)
Give advice to propagator.
Definition: single.hpp:183
int alpha
Pointers updated during propagation.
Definition: precede.hh:79
Single value precedence propagator.
Definition: precede.hh:61
static ExecStatus post(Home home, ViewArray< View > &x, int s, int t)
Post propagator that s precedes t in x.
Definition: single.hpp:96
Advisors for views (by position in array)
Definition: precede.hh:65
Computation spaces.
Definition: core.hpp:1742
virtual Propagator * copy(Space &home)
Copy propagator during cloning.
Definition: single.hpp:136
ViewArray< View > x
Array of views.
Definition: pattern.hpp:145
ExecStatus updateBeta(Space &home)
Update the beta pointer.
Definition: single.hpp:72
ExecStatus updateAlpha(Space &home)
Update the alpha pointer.
Definition: single.hpp:61
Gecode toplevel namespace
Base-class for propagators.
Definition: core.hpp:1064
Generic domain change information to be supplied to advisors.
Definition: core.hpp:204
Home class for posting propagators
Definition: core.hpp:856
n-ary propagator
Definition: pattern.hpp:142
ModEventDelta med
A set of modification events (used during propagation)
Definition: core.hpp:1075
Single(Home home, ViewArray< View > &x, int s, int t, int beta, int gamma)
Constructor for posting.
Definition: single.hpp:84
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition: single.hpp:211
int beta
Definition: precede.hh:79
int s
The value s must precede t.
Definition: precede.hh:77
int t
Definition: precede.hh:77
struct Gecode::@602::NNF::@65::@67 a
For atomic nodes.
virtual size_t dispose(Space &home)
Delete propagator and return its size.
Definition: single.hpp:160
Council< Index > c
The advisor council.
Definition: precede.hh:75
int i
The position of the view in the view array.
Definition: precede.hh:68
Index(Space &home, Propagator &p, Council< Index > &c, int i)
Create index advisor.
Definition: single.hpp:49
Propagation cost.
Definition: core.hpp:486
Council of advisors
Definition: core.hpp:155
Gecode::IntSet d(v, 7)
Base-class for advisors.
Definition: core.hpp:1292
virtual void reschedule(Space &home)
Schedule function.
Definition: single.hpp:177
View arrays.
Definition: array.hpp:253
int ModEventDelta
Modification event deltas.
Definition: core.hpp:89
virtual PropCost cost(const Space &, const ModEventDelta &) const
Cost function.
Definition: single.hpp:171
int p
Number of positive literals for node type.
Definition: bool-expr.cpp:232
int gamma
Definition: precede.hh:79
ExecStatus
Definition: core.hpp:472