private FSM <int> ParseSet()
{
List <int> charset = new List <int>();
bool negate = false;
if (this.Pattern[_parseIndex] == '^')
{
negate = true;
_parseIndex++;
}
while (this.Pattern[_parseIndex] != ']')
{
switch (this.Pattern[_parseIndex])
{
case '\\':
_parseIndex++;
charset.Add(this.Pattern[_parseIndex++]);
break;
case '-':
_parseIndex++;
int start = charset.Last();
charset.RemoveAt(charset.Count - 1);
for (int c = start; c <= this.Pattern[_parseIndex]; c++)
{
charset.Add(c);
}
_parseIndex++;
break;
default:
charset.Add(this.Pattern[_parseIndex++]);
break;
}
}
//consume closing set
_parseIndex++;
FSM <int> result = new NFSM <int>(-1);
for (int i = 0; i < 256; i++)
{
if (i != (int)'\\')
{
if ((!negate && charset.Contains(i)) || (negate && !charset.Contains(i)))
{
result = result.Or(i);
}
}
}
return(result);
}
private FSM <int> AnyChar()
{
FSM <int> result = new NFSM <int>(-1);
for (int i = 0; i < 256; i++)
{
result = result.Or(i);
}
return(result);
}
