Method addColumn

src/Table.cpp:6–12

namespace internal {

void Table::addColumn(const std::string column) {
    if (rows.empty()) {
        columns.push_back(column);
    } else {
        throw std::runtime_error("Cannot alter columns after rows have been added");
    }
}

void Table::addRow(const row_type& row) {
    const basic_type::size_type colSize = columns.size();