private void ConvertNodeOneloop(RegexNode node)
{
//TBD:ignore case
//bool ignoreCase = ((node._options & RegexOptions.IgnoreCase) != 0);
char c = node._ch;
string cond = string.Format("(re-range {0} {0})", EscapeCharSMT(c));
WriteLoop(cond, node._m, node._n);
}