public override void ExitRules(BisonParser.RulesContext context)
{
rhs.RemoveAt(rhs.Count - 1);
rules.Add(new Tuple <string, List <List <string> > >(lhs, rhs));
}
public override void EnterRules(BisonParser.RulesContext context)
{
lhs = context.GetChild(0).GetText();
}