3 #ifndef _EQUALITY_NODE_CPP_ 4 #define _EQUALITY_NODE_CPP_ 6 #ifndef _MADARA_NO_KARL_ 40 bool left_child_can_change =
false;
41 bool right_child_can_change =
false;
47 left_value = this->
left_->
prune (left_child_can_change);
48 if (!left_child_can_change && dynamic_cast <LeafNode *> (
left_) == 0)
57 "madara::expression::CompositeEqualityNode::" 58 "KARL COMPILE ERROR: Equality has no left expression\n");
60 throw KarlException (
"madara::expression::CompositeEqualityNode::" 61 "KARL COMPILE ERROR: Equality has no left expression\n");
66 right_value = this->
right_->
prune (right_child_can_change);
67 if (!right_child_can_change && dynamic_cast <LeafNode *> (
right_) == 0)
76 "madara::expression::CompositeEqualityNode::" 77 "KARL COMPILE ERROR: Equality has no right expression\n");
79 throw KarlException (
"madara::expression::CompositeEqualityNode::" 80 "KARL COMPILE ERROR: Equality has no right expression\n");
84 can_change = left_child_can_change || right_child_can_change;
104 visitor.
visit (*
this);
107 #endif // _MADARA_NO_KARL_ 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 prune(bool &can_change)
Prunes the expression tree of unnecessary nodes.
madara::knowledge::KnowledgeRecord KnowledgeRecord
virtual void accept(Visitor &visitor) const
Accepts a visitor subclassed from the Visitor class.
logger::Logger * logger_
handle the context
virtual madara::knowledge::KnowledgeRecord evaluate(const madara::knowledge::KnowledgeUpdateSettings &settings)=0
Evaluates the expression tree.
Defines a left and right node (via inheritance from CompositeUnaryNode).
Defines a node that contains a madara::knowledge::KnowledgeRecord::Integer value. ...
Provides knowledge logging services to files and terminals.
ComponentNode * left_
left expression
A multi-threaded logger for logging to one or more destinations.
void set_value(const KnowledgeRecord &new_value)
Sets the value from another KnowledgeRecord, does not copy clock and write_quality.
CompositeEqualityNode(logger::Logger &logger, ComponentNode *left, ComponentNode *right)
Constructor.
virtual madara::knowledge::KnowledgeRecord item(void) const
Returns the printable character of the node.
#define madara_logger_ptr_log(logger, level,...)
Fast version of the madara::logger::log method for Logger pointers.
An abstract base class defines a simple abstract implementation of an expression tree node...
virtual madara::knowledge::KnowledgeRecord evaluate(const madara::knowledge::KnowledgeUpdateSettings &settings)
Evaluates the expression tree.
Abstract base class for all visitors to all classes that derive from ComponentNode.
An exception for unrecoverable KaRL compilation issues.
Settings for applying knowledge updates.
virtual void visit(const LeafNode &node)=0
Visit a LeafNode.
Copyright (c) 2015 Carnegie Mellon University.