public void add_fact(Term.Opcode op, Expression a)
{
if (op == Term.Opcode.plus)
{
value += a.calculate();
}
else if (op == Term.Opcode.minus)
{
value -= a.calculate();
}
}
private Expression parseTerm()
{
Expression result = parseFactor();
while (true)
{
Term.Opcode op = parseTermOperator();
if (op != Term.Opcode.none)
{
Expression right = parseFactor();
result = new Term(op, result, right);
}
else
{
break;
}
}
return(result);
}
