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var.hpp
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3  * Main authors:
4  * Christian Schulte <schulte@gecode.org>
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7  * Christian Schulte, 2008
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33 
34 namespace Gecode {
35 
40  class Var {};
41 
46  template<class VarImp>
47  class VarImpVar : public Var {
48  protected:
52  VarImpVar(void);
54  VarImpVar(VarImp* y);
55  public:
57  typedef VarImp VarImpType;
59 
60  VarImp* varimp(void) const;
63  unsigned int degree(void) const;
65  double afc(void) const;
67 
69 
70  bool assigned(void) const;
73 
75 
76  void update(Space& home, VarImpVar<VarImp>& y);
79 
81 
82  bool same(const VarImpVar<VarImp>& y) const;
85  bool before(const VarImpVar<VarImp>& y) const;
87  };
88 
89 
90  /*
91  * Variable: contains a pointer to a variable implementation
92  *
93  */
94  template<class VarImp>
97  : x(NULL) {}
98  template<class VarImp>
101  : x(y) {}
102  template<class VarImp>
105  return x;
106  }
107  template<class VarImp>
108  forceinline unsigned int
110  return x->degree();
111  }
112  template<class VarImp>
113  forceinline double
115  return x->afc();
116  }
117  template<class VarImp>
118  forceinline bool
120  return x->assigned();
121  }
122  template<class VarImp>
123  forceinline void
125  x = y.x->copy(home);
126  }
127  template<class VarImp>
128  forceinline bool
130  return varimp() == y.varimp();
131  }
132  template<class VarImp>
133  forceinline bool
135  return varimp() < y.varimp();
136  }
137 
138 }
139 
140 // STATISTICS: kernel-var
Base-class for variable implementations.
Definition: core.hpp:156
Variables as interfaces to variable implementations.
Definition: var.hpp:47
VarImpVar(void)
Default constructor.
Definition: var.hpp:96
VarImp * varimp(void) const
Return variable implementation of variable.
Definition: var.hpp:104
AFC afc
Definition: afc.cpp:135
#define forceinline
Definition: config.hpp:185
Computation spaces.
Definition: core.hpp:1701
VarImp VarImpType
The variable implementation type corresponding to the variable.
Definition: var.hpp:57
bool same(const ConstView< ViewA > &, const ConstView< ViewB > &)
Test whether two views are the same.
Definition: view.hpp:676
VarImp * x
Pointer to variable implementation.
Definition: var.hpp:50
bool before(const ViewA &x, const ViewB &y)
Definition: view.hpp:723
bool before(const Item &i, const Item &j)
Test whether one item is before another.
Definition: propagate.hpp:76
Post propagator for SetVar SetOpType SetVar y
Definition: set.hh:765
Base class for variables.
Definition: var.hpp:40
Node * x
Pointer to corresponding Boolean expression node.
Definition: bool-expr.cpp:249
bool assigned(View x, int v)
Whether x is assigned to value v.
Definition: single.hpp:43
bool same(const Item &i, const Item &j)
Whether two items are the same.
Definition: propagate.hpp:72
Post propagator for SetVar x
Definition: set.hh:765
Gecode toplevel namespace
void update(IntSet &y, Space &home, IntSet &py)
Definition: rel.hpp:103