private StringBuilder ToStringBuilder(StringBuilder sb)
{
switch (kind)
{
case Kind.RegexpUnion:
sb.Append("(");
exp1.ToStringBuilder(sb);
sb.Append("|");
exp2.ToStringBuilder(sb);
sb.Append(")");
break;
case Kind.RegexpConcatenation:
exp1.ToStringBuilder(sb);
exp2.ToStringBuilder(sb);
break;
case Kind.RegexpIntersection:
sb.Append("(");
exp1.ToStringBuilder(sb);
sb.Append("&");
exp2.ToStringBuilder(sb);
sb.Append(")");
break;
case Kind.RegexpOptional:
sb.Append("(");
exp1.ToStringBuilder(sb);
sb.Append(")?");
break;
case Kind.RegexpRepeat:
sb.Append("(");
exp1.ToStringBuilder(sb);
sb.Append(")*");
break;
case Kind.RegexpRepeatMin:
sb.Append("(");
exp1.ToStringBuilder(sb);
sb.Append("){").Append(min).Append(",}");
break;
case Kind.RegexpRepeatMinMax:
sb.Append("(");
exp1.ToStringBuilder(sb);
sb.Append("){").Append(min).Append(",").Append(max).Append("}");
break;
case Kind.RegexpComplement:
sb.Append("~(");
exp1.ToStringBuilder(sb);
sb.Append(")");
break;
case Kind.RegexpChar:
sb.Append("\\").Append(c);
break;
case Kind.RegexpCharRange:
sb.Append("[\\").Append(from).Append("-\\").Append(to).Append("]");
break;
case Kind.RegexpAnyChar:
sb.Append(".");
break;
case Kind.RegexpEmpty:
sb.Append("#");
break;
case Kind.RegexpString:
sb.Append("\"").Append(s).Append("\"");
break;
case Kind.RegexpAnyString:
sb.Append("@");
break;
case Kind.RegexpAutomaton:
sb.Append("<").Append(s).Append(">");
break;
case Kind.RegexpInterval:
string s1 = Convert.ToDecimal(min).ToString();
string s2 = Convert.ToDecimal(max).ToString();
sb.Append("<");
if (digits > 0)
{
for (int i = s1.Length; i < digits; i++)
{
sb.Append('0');
}
}
sb.Append(s1).Append("-");
if (digits > 0)
{
for (int i = s2.Length; i < digits; i++)
{
sb.Append('0');
}
}
sb.Append(s2).Append(">");
break;
}
return(sb);
}
