#include "Expression.h"

#include <stdexcept>
#include <ostream>

/* Implement Expression here */

/* For part B */
void print(std::ostream& os) const
{
    throw std::invalid_argument{"--print is unimplemented"};
}

/* For part C */
void Expression::expand()
{
    throw std::invalid_argument{"--expand is unimplemented"};
}