double CParseTreeNode::EvaluateSibbling(
TPParseTreeNode first_second_or_third_sibbling, bool log) {
// We allow NULL-nodes here, because that can happen
// after the end of a sequence of when-conditions
if (first_second_or_third_sibbling == NULL) {
return kUndefinedZero;
}
double result = first_second_or_third_sibbling->Evaluate(log);
return result;
}
double CParseTreeOperatorNode::EvaluateSibbling(
TPParseTreeNode first_second_or_third_sibbling, bool log) {
// We allow NULL-nodes here, because that can happen
// after the end of a sequence of when-conditions
if (first_second_or_third_sibbling == NULL) {
// When evaluating an empty tree we evaluate a special symbol
// kEmptyxpression_False_Zero_WhenOthersFoldForce
// for better readability of the log-file.
double null_value = CParseTreeTerminalNodeIdentifier::EvaluateIdentifier(
kEmptyExpression_False_Zero_WhenOthersFoldForce, log);
write_log(preferences.debug_formula(),
"[CParseTreeOperatorNode] Evaluating empty tree: false / zero / fold\n");
assert(null_value == kUndefinedZero);
return null_value;
}
double result = first_second_or_third_sibbling->Evaluate(log);
return result;
}