void \@Base::errorVerbose_()
{
    std::cout << "Parser State stack containing " << (d_stackIdx_ + 1) <<
                                                                "elements:\n"
                 "Each line shows a stack index followed "
                                    "by the value of that stack element\n";
    for (size_t idx = d_stackIdx_ + 1; idx--; )
       std::cout << std::setw(2) << idx << ": " <<
                    std::setw(3) << d_stateStack_[idx] << '\n';
}

