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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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33 
34 namespace Gecode { namespace Gist {
35 
36  template<class Cursor>
38  NodeVisitor<Cursor>::NodeVisitor(const Cursor& c0) : c(c0) {}
39 
40  template<class Cursor>
41  forceinline void
42  NodeVisitor<Cursor>::setCursor(const Cursor& c0) { c = c0; }
43 
44  template<class Cursor>
45  forceinline Cursor&
47 
48  template<class Cursor>
49  forceinline void
51  while (c.mayMoveDownwards()) {
52  c.moveDownwards();
53  }
54  }
55 
56  template<class Cursor>
58  : NodeVisitor<Cursor>(c0) {
59  moveToLeaf();
60  }
61 
62  template<class Cursor>
63  forceinline bool
65  c.processCurrentNode();
66  if (c.mayMoveSidewards()) {
67  c.moveSidewards();
68  moveToLeaf();
69  } else if (c.mayMoveUpwards()) {
70  c.moveUpwards();
71  } else {
72  return false;
73  }
74  return true;
75  }
76 
77  template<class Cursor>
78  forceinline void
80  while (next()) {}
81  }
82 
83  template<class Cursor>
84  forceinline bool
86  while (! c.mayMoveSidewards() && c.mayMoveUpwards()) {
87  c.moveUpwards();
88  }
89  if (! c.mayMoveUpwards()) {
90  return false;
91  } else {
92  c.moveSidewards();
93  }
94  return true;
95  }
96 
97  template<class Cursor>
99  : NodeVisitor<Cursor>(c0) {}
100 
101  template<class Cursor>
102  forceinline bool
104  c.processCurrentNode();
105  if (c.mayMoveDownwards()) {
106  c.moveDownwards();
107  } else if (c.mayMoveSidewards()) {
108  c.moveSidewards();
109  } else {
110  return backtrack();
111  }
112  return true;
113  }
114 
115  template<class Cursor>
116  forceinline void
118  while (next()) {}
119  }
120 }}
121 
122 // STATISTICS: gist-any
bool next(void)
Move cursor to next node, return true if succeeded.
Definition: nodevisitor.hpp:64
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:42
#define forceinline
Definition: config.hpp:185
void run(void)
Execute visitor.
Definition: nodevisitor.hpp:79
PostorderNodeVisitor(const Cursor &c)
Constructor.
Definition: nodevisitor.hpp:57
Gecode::FloatVal c(-8, 8)
PreorderNodeVisitor(const Cursor &c)
Constructor.
Definition: nodevisitor.hpp:98
Cursor & getCursor(void)
Return the cursor.
Definition: nodevisitor.hpp:46
Cursor c
The cursor.
Definition: nodevisitor.hh:44
void run(void)
Execute visitor.
bool backtrack(void)
Move cursor to next node from a leaf.
Definition: nodevisitor.hpp:85
void moveToLeaf(void)
Move the cursor to the left-most leaf.
Definition: nodevisitor.hpp:50
Base class for a visitor that runs a cursor over a tree.
Definition: nodevisitor.hh:41
Gecode toplevel namespace
NodeVisitor(const Cursor &c0)
Constructor.
Definition: nodevisitor.hpp:38