toNfa method
Implementation
@override
Nfa toNfa() {
final start = NfaState(isEnd: false);
final end = NfaState(isEnd: true);
final leftNfa = left.toNfa();
start.epsilons.add(leftNfa.start);
leftNfa.end.epsilons.add(end);
leftNfa.end.isEnd = false;
final rightNfa = right.toNfa();
start.epsilons.add(rightNfa.start);
rightNfa.end.epsilons.add(end);
rightNfa.end.isEnd = false;
return Nfa(start: start, end: end);
}