MADARA  3.1.8
CompositeNotNode.cpp
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1 /* -*- C++ -*- */
2 #ifndef _NOT_NODE_CPP_
3 #define _NOT_NODE_CPP_
4 
5 #ifndef _MADARA_NO_KARL_
6 
7 #include <iostream>
8 
14 
17 : CompositeUnaryNode (logger, right)
18 {
19 }
20 
21 // Dtor
23 {
24 }
25 
28 {
30  record.set_value ("!");
31  return record;
32 }
33 
34 
40 {
41  bool right_child_can_change = false;
43 
44  if (this->right_)
45  {
46  right_value = this->right_->prune (right_child_can_change);
47  if (!right_child_can_change && dynamic_cast <LeafNode *> (right_) == 0)
48  {
49  delete this->right_;
50  this->right_ = new LeafNode (*(this->logger_), right_value);
51  }
52  }
53  else
54  {
56  "KARL COMPILE ERROR: "
57  "Logical-not has no right expression\n");
58 
59  exit (-1);
60  }
61 
62  can_change = right_child_can_change;
63 
64  return knowledge::KnowledgeRecord (!right_value);
65 }
66 
67 
73 {
74  return knowledge::KnowledgeRecord (!right_->evaluate (settings));
75 }
76 
77 // accept a visitor
78 void
80 {
81  visitor.visit (*this);
82 }
83 
84 #endif // _MADARA_NO_KARL_
85 
86 #endif /* _NOT_NODE_CPP_ */
This class encapsulates an entry in a KnowledgeBase.
virtual madara::knowledge::KnowledgeRecord prune(bool &can_change)=0
Prunes the expression tree of unnecessary nodes.
ComponentNode * right_
Right expression.
virtual madara::knowledge::KnowledgeRecord item(void) const
Returns the printable character of the node.
madara::knowledge::KnowledgeRecord KnowledgeRecord
virtual void accept(Visitor &visitor) const
Accepts a visitor subclassed from the Visitor class.
logger::Logger * logger_
handle the context
Definition: ComponentNode.h:96
virtual madara::knowledge::KnowledgeRecord evaluate(const madara::knowledge::KnowledgeUpdateSettings &settings)=0
Evaluates the expression tree.
Defines a node that contains a madara::knowledge::KnowledgeRecord::Integer value. ...
Definition: LeafNode.h:23
Provides knowledge logging services to files and terminals.
Definition: GlobalLogger.h:11
CompositeNotNode(logger::Logger &logger, ComponentNode *right)
Constructor.
A multi-threaded logger for logging to one or more destinations.
Definition: Logger.h:88
void set_value(const KnowledgeRecord &new_value)
Sets the value from another KnowledgeRecord, does not copy clock and write_quality.
virtual madara::knowledge::KnowledgeRecord prune(bool &can_change)
Prunes the expression tree of unnecessary nodes.
#define madara_logger_ptr_log(logger, level,...)
Fast version of the madara::logger::log method for Logger pointers.
Definition: Logger.h:32
virtual madara::knowledge::KnowledgeRecord evaluate(const madara::knowledge::KnowledgeUpdateSettings &settings)
Evaluates the node.
An abstract base class defines a simple abstract implementation of an expression tree node...
Definition: ComponentNode.h:35
Abstract base class for all visitors to all classes that derive from ComponentNode.
Definition: Visitor.h:90
virtual ~CompositeNotNode(void)
Destructor.
Settings for applying knowledge updates.
Encapsulates a single expression tree.
virtual void visit(const LeafNode &node)=0
Visit a LeafNode.