internal static Automaton MakeCharSet(string set)
{
if (set.Length == 1)
{
return(MakeChar(set[0]));
}
var a = new Automaton();
var s1 = new State();
var s2 = new State();
a.Initial = s1;
s2.Accept = true;
foreach (char t in set)
{
s1.Transitions.Add(new Transition(t, s2));
}
a.IsDeterministic = true;
a.Reduce();
return(a);
}