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nodevisitor.hpp
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1 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2 /*
3  * Main authors:
4  * Guido Tack <tack@gecode.org>
5  *
6  * Copyright:
7  * Guido Tack, 2006
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9  * Last modified:
10  * $Date: 2010-07-30 17:08:42 +0200 (Fri, 30 Jul 2010) $ by $Author: tack $
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37 
38 namespace Gecode { namespace Gist {
39 
40  template<class Cursor>
42  NodeVisitor<Cursor>::NodeVisitor(const Cursor& c0) : c(c0) {}
43 
44  template<class Cursor>
45  forceinline void
46  NodeVisitor<Cursor>::setCursor(const Cursor& c0) { c = c0; }
47 
48  template<class Cursor>
49  forceinline Cursor&
51 
52  template<class Cursor>
53  forceinline void
55  while (c.mayMoveDownwards()) {
56  c.moveDownwards();
57  }
58  }
59 
60  template<class Cursor>
62  : NodeVisitor<Cursor>(c0) {
63  moveToLeaf();
64  }
65 
66  template<class Cursor>
67  forceinline bool
69  c.processCurrentNode();
70  if (c.mayMoveSidewards()) {
71  c.moveSidewards();
72  moveToLeaf();
73  } else if (c.mayMoveUpwards()) {
74  c.moveUpwards();
75  } else {
76  return false;
77  }
78  return true;
79  }
80 
81  template<class Cursor>
82  forceinline void
84  while (next()) {}
85  }
86 
87  template<class Cursor>
88  forceinline bool
90  while (! c.mayMoveSidewards() && c.mayMoveUpwards()) {
91  c.moveUpwards();
92  }
93  if (! c.mayMoveUpwards()) {
94  return false;
95  } else {
96  c.moveSidewards();
97  }
98  return true;
99  }
100 
101  template<class Cursor>
103  : NodeVisitor<Cursor>(c0) {}
104 
105  template<class Cursor>
106  forceinline bool
108  c.processCurrentNode();
109  if (c.mayMoveDownwards()) {
110  c.moveDownwards();
111  } else if (c.mayMoveSidewards()) {
112  c.moveSidewards();
113  } else {
114  return backtrack();
115  }
116  return true;
117  }
118 
119  template<class Cursor>
120  forceinline void
122  while (next()) {}
123  }
124 }}
125 
126 // STATISTICS: gist-any
bool next(void)
Move cursor to next node, return true if succeeded.
Definition: nodevisitor.hpp:68
bool next(void)
Move cursor to the next node, return true if succeeded.
void setCursor(const Cursor &c0)
Reset the cursor object to c0.
Definition: nodevisitor.hpp:46
void run(void)
Execute visitor.
Definition: nodevisitor.hpp:83
PostorderNodeVisitor(const Cursor &c)
Constructor.
Definition: nodevisitor.hpp:61
Gecode::FloatVal c(-8, 8)
PreorderNodeVisitor(const Cursor &c)
Constructor.
Cursor & getCursor(void)
Return the cursor.
Definition: nodevisitor.hpp:50
void run(void)
Execute visitor.
#define forceinline
Definition: config.hpp:132
bool backtrack(void)
Move cursor to next node from a leaf.
Definition: nodevisitor.hpp:89
void moveToLeaf(void)
Move the cursor to the left-most leaf.
Definition: nodevisitor.hpp:54
Base class for a visitor that runs a cursor over a tree.
Definition: nodevisitor.hh:45
Gecode toplevel namespace
NodeVisitor(const Cursor &c0)
Constructor.
Definition: nodevisitor.hpp:42