MADARA  3.1.8
CompositePostincrementNode.cpp
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1 /* -*- C++ -*- */
2 #ifndef _COMPOSITE_PREINCREMENT_NODE_CPP_
3 #define _COMPOSITE_PREINCREMENT_NODE_CPP_
4 
5 #ifndef _MADARA_NO_KARL_
6 
7 #include <iostream>
8 
15 
18 : CompositeUnaryNode (logger, right)
19 {
20  var_ = dynamic_cast <VariableNode *> (right);
21 
22  if (!var_)
23  array_ = dynamic_cast <CompositeArrayReference *> (right);
24 }
25 
26 // Dtor
28 {
29 }
30 
33 {
35  record.set_value ("++");
36  return record;
37 }
38 
44 {
45  bool right_child_can_change = false;
47 
48  if (this->right_)
49  {
50  right_value = this->right_->prune (right_child_can_change);
51  if (!right_child_can_change && dynamic_cast <LeafNode *> (right_) == 0)
52  {
53  delete this->right_;
54  this->right_ = new LeafNode (*(this->logger_), right_value);
55  }
56  }
57  else
58  {
60  "KARL COMPILE ERROR: Preincrement has no right expression\n");
61 
62  exit (-1);
63  }
64 
65  can_change = right_child_can_change;
66 
67  return ++right_value;
68 }
69 
75 {
77 
78  if (var_)
79  {
80  return_value = var_->evaluate (settings);
81  var_->inc (settings);
82  }
83  else if (array_)
84  {
85  return_value = array_->evaluate (settings);
86  array_->inc (settings);
87  }
88  else
89  {
90  return_value = ++(this->right_->evaluate (settings));
91  }
92 
93  return return_value;
94 }
95 
96 // accept a visitor
97 void
99 {
100  visitor.visit (*this);
101 }
102 
103 #endif // _MADARA_NO_KARL_
104 
105 #endif /* _COMPOSITE_PREINCREMENT_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.
Defines a terminal node of that references the current value stored in a variable.
Definition: VariableNode.h:28
ComponentNode * right_
Right expression.
virtual madara::knowledge::KnowledgeRecord evaluate(const madara::knowledge::KnowledgeUpdateSettings &settings)
Evaluates the node and its children.
knowledge::KnowledgeRecord inc(const madara::knowledge::KnowledgeUpdateSettings &settings=knowledge::KnowledgeUpdateSettings())
Sets the value stored in the node.
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.
virtual madara::knowledge::KnowledgeRecord item(void) const
Returns the printable character of the node.
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
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 evaluate(const madara::knowledge::KnowledgeUpdateSettings &settings)
Evaluates the node.
CompositePostincrementNode(logger::Logger &logger, ComponentNode *right)
Constructor.
#define madara_logger_ptr_log(logger, level,...)
Fast version of the madara::logger::log method for Logger pointers.
Definition: Logger.h:32
virtual void accept(Visitor &visitor) const
Accepts a visitor subclassed from the Visitor class.
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 madara::knowledge::KnowledgeRecord prune(bool &can_change)
Prunes the expression tree of unnecessary nodes.
madara::knowledge::KnowledgeRecord inc(const madara::knowledge::KnowledgeUpdateSettings &settings=knowledge::KnowledgeUpdateSettings())
Atomically increment the variable.
virtual madara::knowledge::KnowledgeRecord evaluate(const madara::knowledge::KnowledgeUpdateSettings &settings)
Evaluates the node and its children.
CompositeArrayReference * array_
variable index holder
Settings for applying knowledge updates.
Encapsulates a single expression tree.
virtual void visit(const LeafNode &node)=0
Visit a LeafNode.
virtual ComponentNode * right(void) const
Returns the right expression.
Defines a terminal node of that references the current value stored in a variable.