void test_depth_first_iterator::test_dfi()
{
std::string infix("7-(3+(4-6))+1*8");
CEvaluationTree* pTree = new CEvaluationTree();
pTree->setInfix(infix);
std::string s = pTree->getInfix();
CPPUNIT_ASSERT(pTree->getRoot() != NULL);
CEvaluationNodeDepthFirstIterator it(pTree->getRoot());
CPPUNIT_ASSERT(it.isValid());
CEvaluationNode* pNode = NULL;
CEvaluationNodeNumber* pNumberNode = NULL;
CEvaluationNodeOperator* pOperatorNode = NULL;
// 7
pNode = *it;
CPPUNIT_ASSERT(pNode != NULL);
CPPUNIT_ASSERT(CEvaluationNode::type(pNode->getType()) == CEvaluationNode::NUMBER);
pNumberNode = dynamic_cast<CEvaluationNodeNumber*>(pNode);
CPPUNIT_ASSERT(pNumberNode != NULL);
CPPUNIT_ASSERT((fabs(pNumberNode->getValue() - 7) / 7.0) <= std::numeric_limits<double>::min());
// 3
++it;
CPPUNIT_ASSERT(it.isValid() == true);
pNode = *it;
CPPUNIT_ASSERT(pNode != NULL);
CPPUNIT_ASSERT(CEvaluationNode::type(pNode->getType()) == CEvaluationNode::NUMBER);
pNumberNode = dynamic_cast<CEvaluationNodeNumber*>(pNode);
CPPUNIT_ASSERT(pNumberNode != NULL);
CPPUNIT_ASSERT((fabs(pNumberNode->getValue() - 3) / 3.0) <= std::numeric_limits<double>::min());
// 4
++it;
CPPUNIT_ASSERT(it.isValid() == true);
pNode = *it;
CPPUNIT_ASSERT(pNode != NULL);
CPPUNIT_ASSERT(CEvaluationNode::type(pNode->getType()) == CEvaluationNode::NUMBER);
pNumberNode = dynamic_cast<CEvaluationNodeNumber*>(pNode);
CPPUNIT_ASSERT(pNumberNode != NULL);
CPPUNIT_ASSERT((fabs(pNumberNode->getValue() - 4) / 4.0) <= std::numeric_limits<double>::min());
// 6
++it;
CPPUNIT_ASSERT(it.isValid() == true);
pNode = *it;
CPPUNIT_ASSERT(pNode != NULL);
CPPUNIT_ASSERT(CEvaluationNode::type(pNode->getType()) == CEvaluationNode::NUMBER);
pNumberNode = dynamic_cast<CEvaluationNodeNumber*>(pNode);
CPPUNIT_ASSERT(pNumberNode != NULL);
CPPUNIT_ASSERT((fabs(pNumberNode->getValue() - 6) / 6.0) <= std::numeric_limits<double>::min());
// -
++it;
CPPUNIT_ASSERT(it.isValid() == true);
pNode = *it;
CPPUNIT_ASSERT(pNode != NULL);
CPPUNIT_ASSERT(CEvaluationNode::type(pNode->getType()) == CEvaluationNode::OPERATOR);
pOperatorNode = dynamic_cast<CEvaluationNodeOperator*>(pNode);
CPPUNIT_ASSERT(pOperatorNode != NULL);
CPPUNIT_ASSERT((CEvaluationNodeOperator::SubType)CEvaluationNode::subType(pOperatorNode->getType()) == CEvaluationNodeOperator::MINUS);
// +
++it;
CPPUNIT_ASSERT(it.isValid() == true);
pNode = *it;
CPPUNIT_ASSERT(pNode != NULL);
CPPUNIT_ASSERT(CEvaluationNode::type(pNode->getType()) == CEvaluationNode::OPERATOR);
pOperatorNode = dynamic_cast<CEvaluationNodeOperator*>(pNode);
CPPUNIT_ASSERT(pOperatorNode != NULL);
CPPUNIT_ASSERT((CEvaluationNodeOperator::SubType)CEvaluationNode::subType(pOperatorNode->getType()) == CEvaluationNodeOperator::PLUS);
// -
++it;
CPPUNIT_ASSERT(it.isValid() == true);
pNode = *it;
CPPUNIT_ASSERT(pNode != NULL);
CPPUNIT_ASSERT(CEvaluationNode::type(pNode->getType()) == CEvaluationNode::OPERATOR);
pOperatorNode = dynamic_cast<CEvaluationNodeOperator*>(pNode);
CPPUNIT_ASSERT(pOperatorNode != NULL);
CPPUNIT_ASSERT((CEvaluationNodeOperator::SubType)CEvaluationNode::subType(pOperatorNode->getType()) == CEvaluationNodeOperator::MINUS);
// 1
++it;
CPPUNIT_ASSERT(it.isValid() == true);
pNode = *it;
CPPUNIT_ASSERT(pNode != NULL);
CPPUNIT_ASSERT(CEvaluationNode::type(pNode->getType()) == CEvaluationNode::NUMBER);
pNumberNode = dynamic_cast<CEvaluationNodeNumber*>(pNode);
CPPUNIT_ASSERT(pNumberNode != NULL);
CPPUNIT_ASSERT((fabs(pNumberNode->getValue() - 1) / 1.0) <= std::numeric_limits<double>::min());
// 8
++it;
CPPUNIT_ASSERT(it.isValid() == true);
pNode = *it;
CPPUNIT_ASSERT(pNode != NULL);
CPPUNIT_ASSERT(CEvaluationNode::type(pNode->getType()) == CEvaluationNode::NUMBER);
pNumberNode = dynamic_cast<CEvaluationNodeNumber*>(pNode);
CPPUNIT_ASSERT(pNumberNode != NULL);
CPPUNIT_ASSERT((fabs(pNumberNode->getValue() - 8) / 8.0) <= std::numeric_limits<double>::min());
// *
++it;
CPPUNIT_ASSERT(it.isValid() == true);
pNode = *it;
CPPUNIT_ASSERT(pNode != NULL);
CPPUNIT_ASSERT(CEvaluationNode::type(pNode->getType()) == CEvaluationNode::OPERATOR);
pOperatorNode = dynamic_cast<CEvaluationNodeOperator*>(pNode);
CPPUNIT_ASSERT(pOperatorNode != NULL);
CPPUNIT_ASSERT((CEvaluationNodeOperator::SubType)CEvaluationNode::subType(pOperatorNode->getType()) == CEvaluationNodeOperator::MULTIPLY);
// +
++it;
CPPUNIT_ASSERT(it.isValid() == true);
pNode = *it;
CPPUNIT_ASSERT(pNode != NULL);
CPPUNIT_ASSERT(CEvaluationNode::type(pNode->getType()) == CEvaluationNode::OPERATOR);
pOperatorNode = dynamic_cast<CEvaluationNodeOperator*>(pNode);
CPPUNIT_ASSERT(pOperatorNode != NULL);
CPPUNIT_ASSERT((CEvaluationNodeOperator::SubType)CEvaluationNode::subType(pOperatorNode->getType()) == CEvaluationNodeOperator::PLUS);
++it;
CPPUNIT_ASSERT(it.isValid() == false);
CPPUNIT_ASSERT(*it == NULL);
delete pTree;
}
bool CEvaluationNodeNormalizer::eliminateMultipleNumbers(CEvaluationNodeOperator::SubType subType, std::vector<CEvaluationNode*>& chainNodes)
{
// check if there are several numerical values in the operator chain and
// evaluate those operations
bool changed = false;
if (chainNodes.size() > 1)
{
std::vector<CEvaluationNode*>::iterator it = chainNodes.begin(), endit = chainNodes.end();
if (subType == CEvaluationNodeOperator::MULTIPLY || subType == CEvaluationNodeOperator::PLUS)
{
double value = (subType == CEvaluationNodeOperator::MULTIPLY) ? 1.0 : 0.0;
CEvaluationNodeNumber* pNumberNode = NULL;
std::vector<CEvaluationNode*> numbers;
while (it != endit)
{
pNumberNode = dynamic_cast<CEvaluationNodeNumber*>(*it);
if (pNumberNode != NULL)
{
numbers.push_back(pNumberNode);
if (subType == CEvaluationNodeOperator::MULTIPLY)
{
value *= pNumberNode->getValue();
}
else
{
value += pNumberNode->getValue();
}
}
++it;
}
if (numbers.size() > 1)
{
changed = true;
it = numbers.begin(), endit = numbers.end();
// don't delete the last one since we reset it's value
--endit;
while (it != endit)
{
chainNodes.erase(std::find(chainNodes.begin(), chainNodes.end(), *it));
delete *it;
++it;
}
std::ostringstream os;
os << value;
(*it)->setData(os.str());
}
}
}
return changed;
}