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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 *
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7 * Guido Tack, 2006
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33
34namespace 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>
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
Base class for a visitor that runs a cursor over a tree.
Cursor & getCursor(void)
Return the cursor.
NodeVisitor(const Cursor &c0)
Constructor.
void setCursor(const Cursor &c0)
Reset the cursor object to c0.
PostorderNodeVisitor(const Cursor &c)
Constructor.
bool next(void)
Move cursor to next node, return true if succeeded.
void run(void)
Execute visitor.
void moveToLeaf(void)
Move the cursor to the left-most leaf.
bool next(void)
Move cursor to the next node, return true if succeeded.
PreorderNodeVisitor(const Cursor &c)
Constructor.
bool backtrack(void)
Move cursor to next node from a leaf.
void run(void)
Execute visitor.
Gecode toplevel namespace
#define forceinline
Definition config.hpp:187