ListNode.cpp

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#ifndef _MADARA_NO_KARL_
 
#include "madara/expression/Visitor.h"
#include "madara/expression/ListNode.h"
#include "madara/utility/Utility.h"
 
#include <string>
#include <sstream>
 
madara::expression::ListNode::ListNode(
    madara::knowledge::ThreadSafeContext& context)
  : ComponentNode(context.get_logger()), list_()
{
}
 
madara::expression::ListNode::~ListNode()
{
  // do not clean up record_. Let the context clean that up.
}
 
void madara::expression::ListNode::accept(Visitor& visitor) const
{
  visitor.visit(*this);
}
 
madara::knowledge::KnowledgeRecord madara::expression::ListNode::item() const
{
  return madara::knowledge::KnowledgeRecord(
      madara::knowledge::KnowledgeRecord::Integer(list_.size()));
}
 
madara::knowledge::KnowledgeRecord madara::expression::ListNode::prune(
    bool& can_change)
{
  // a variable is one of very few nodes that can change over time and
  // cannot be pruned
  can_change = true;
 
  return madara::knowledge::KnowledgeRecord(
      madara::knowledge::KnowledgeRecord::Integer(list_.size()));
}
 
madara::knowledge::KnowledgeRecord madara::expression::ListNode::evaluate(
    const madara::knowledge::KnowledgeUpdateSettings& /*settings*/)
{
  return madara::knowledge::KnowledgeRecord(
      madara::knowledge::KnowledgeRecord::Integer(list_.size()));
}
 
#endif  // _MADARA_NO_KARL_