virtual std::string doEvaluate(const DOM::Node<std::string>& context,
const Arabica::XPath::ExecutionContext<std::string>& executionContext) const
{
DOM::Node<std::string> node;
if(baseT::argCount() == 0)
node = context;
else
{
Arabica::XPath::NodeSet<std::string> ns = baseT::argAsNodeSet(0, context, executionContext);
if(ns.size() == 0)
return "";
node = ns.top();
} // if ...
std::ostringstream os;
os << node.underlying_impl();
return os.str();
} // doEvaluate
