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brancher-val-sel.hpp
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1 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2 /*
3  * Main author:
4  * Christian Schulte <schulte@gecode.org>
5  *
6  * Copyright:
7  * Christian Schulte, 2012
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9  * Last modified:
10  * $Date: 2012-10-02 15:49:50 +0200 (Tue, 02 Oct 2012) $ by $Author: schulte $
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37 
38 namespace Gecode {
39 
46  template<class _View, class _Val>
48  class ValSel {
49  public:
51  typedef _View View;
53  typedef _Val Val;
54  public:
56  ValSel(Space& home, const ValBranch& vb);
58  ValSel(Space& home, bool shared, ValSel<View,Val>& vs);
60  bool notice(void) const;
62  void dispose(Space& home);
63  };
64 
66  template<class View>
67  class ValSelFunction :
68  public ValSel<View,
69  typename BranchTraits<typename View::VarType>::ValType> {
70  public:
72  typedef typename ValSel<View,
74  ::ValType>::Val Val;
76  typedef typename View::VarType Var;
79  protected:
81  ValFunction v;
82  public:
84  ValSelFunction(Space& home, const ValBranch& vb);
88  Val val(const Space& home, View x, int i);
89  };
91 
92 
93  // Baseclass value selection
94  template<class View, class Val>
97  template<class View, class Val>
100  template<class View, class Val>
101  forceinline bool
103  return false;
104  }
105  template<class View, class Val>
106  forceinline void
108 
109 
110  // User-defined value selection
111  template<class View>
114  : ValSel<View,Val>(home,vb),
115  v(function_cast<ValFunction>(vb.val())) {}
116  template<class View>
120  : ValSel<View,Val>(home,shared,vs), v(vs.v) {}
121  template<class View>
123  ValSelFunction<View>::val(const Space& home, View x, int i) {
124  typename View::VarType y(x.varimp());
125  return v(home,y,i);
126  }
127 
128 }
129 
130 // STATISTICS: kernel-branch
User-defined value selection.
_View View
View type.
_Val Val
Value type.
ValSelFunction(Space &home, const ValBranch &vb)
Constructor for initialization.
Computation spaces.
Definition: core.hpp:1362
ValSel(Space &home, const ValBranch &vb)
Constructor for initialization.
Gecode::IntArgs i(4, 1, 2, 3, 4)
View::VarType Var
The corresponding variable type.
F1 function_cast(F2 f)
Cast function pointer.
Definition: cast.hpp:60
void dispose(Space &home)
Delete value selection.
const int v[7]
Definition: distinct.cpp:207
bool notice(void) const
Whether dispose must always be called (that is, notice is needed)
Value branching information.
Definition: branch-val.hpp:44
Node * x
Pointer to corresponding Boolean expression node.
Definition: bool-expr.cpp:253
#define forceinline
Definition: config.hpp:132
Val val(const Space &home, View x, int i)
Return user-defined value of view x at position i.
bool shared(const ConstView< ViewA > &, const ConstView< ViewB > &)
Test whether views share same variable.
Definition: view.hpp:662
Gecode toplevel namespace
ValSel< View, typename BranchTraits< typename View::VarType >::ValType >::Val Val
The corresponding value type.
BranchTraits< Var >::Val ValFunction
The corresponding value function.
Base class for value selection.
ValFunction v
The user-defined value function.