public void visit(ICaseRangeNode value)
{
string s = value.GetType().Name + ".";
prepare_node(value.high_bound, s + "hign_bound");
prepare_node(value.lower_bound, s + "lower_bound");
}
public void visit(ICaseRangeNode value)
{
throw new System.NotSupportedException(value.GetType().ToString());
}