MADARA  3.4.1
CompositeLessThanNode.h
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1 #ifndef _MADARA_COMPOSITE_LESS_THAN_NODE_H_
2 #define _MADARA_COMPOSITE_LESS_THAN_NODE_H_
3 
4 #ifndef _MADARA_NO_KARL_
5 
8 
9 namespace madara
10 {
11 namespace expression
12 {
13 // Forward declaration.
14 class ComponentNode;
15 class Visitor;
16 
23 {
24 public:
33 
38  virtual madara::knowledge::KnowledgeRecord item(void) const;
39 
46  virtual madara::knowledge::KnowledgeRecord prune(bool& can_change);
47 
56 
61  virtual void accept(Visitor& visitor) const;
62 };
63 }
64 }
65 
66 #endif // _MADARA_NO_KARL_
67 
68 #endif // _MADARA_COMPOSITE_LESS_THAN_NODE_H_
An abstract base class defines a simple abstract implementation of an expression tree node.
Definition: ComponentNode.h:37
Defines a left and right node (via inheritance from CompositeUnaryNode).
virtual ComponentNode * left(void) const
Returns the left expression.
A composite node that compares left and right children for less than.
virtual void accept(Visitor &visitor) const
Accepts a visitor subclassed from the Visitor class.
virtual madara::knowledge::KnowledgeRecord prune(bool &can_change)
Prunes the expression tree of unnecessary nodes.
virtual madara::knowledge::KnowledgeRecord evaluate(const madara::knowledge::KnowledgeUpdateSettings &settings)
Evaluates the expression tree.
virtual madara::knowledge::KnowledgeRecord item(void) const
Returns the printable character of the node.
CompositeLessThanNode(logger::Logger &logger, ComponentNode *left, ComponentNode *right)
Constructor.
virtual ComponentNode * right(void) const
Returns the right expression.
Abstract base class for all visitors to all classes that derive from ComponentNode.
Definition: Visitor.h:93
This class encapsulates an entry in a KnowledgeBase.
Settings for applying knowledge updates.
A multi-threaded logger for logging to one or more destinations.
Definition: Logger.h:165
Provides knowledge logging services to files and terminals.
Definition: GlobalLogger.h:12
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