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nodevisitor.hh
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4  * Guido Tack <tack@gecode.org>
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7  * Guido Tack, 2006
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37 
38 #ifndef GECODE_GIST_NODEVISITOR_HH
39 #define GECODE_GIST_NODEVISITOR_HH
40 
41 namespace Gecode { namespace Gist {
42 
44  template<class Cursor>
45  class NodeVisitor {
46  protected:
48  Cursor c;
49  public:
51  NodeVisitor(const Cursor& c0);
53  void setCursor(const Cursor& c0);
55  Cursor& getCursor(void);
56  };
57 
59  template<class Cursor>
60  class PostorderNodeVisitor : public NodeVisitor<Cursor> {
61  protected:
64  void moveToLeaf(void);
65  public:
67  PostorderNodeVisitor(const Cursor& c);
69  bool next(void);
71  void run(void);
72  };
73 
75  template<class Cursor>
76  class PreorderNodeVisitor : public NodeVisitor<Cursor> {
77  protected:
80  bool backtrack(void);
81  public:
83  PreorderNodeVisitor(const Cursor& c);
85  bool next(void);
87  void run(void);
88  };
89 
90 }}
91 
93 
94 #endif
95 
96 // 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
Run a cursor over a tree, processing nodes in post-order.
Definition: nodevisitor.hh:60
PreorderNodeVisitor(const Cursor &c)
Constructor.
Cursor & getCursor(void)
Return the cursor.
Definition: nodevisitor.hpp:50
Cursor c
The cursor.
Definition: nodevisitor.hh:48
void run(void)
Execute visitor.
Run a cursor over a tree, processing nodes in pre-order.
Definition: nodevisitor.hh:76
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