fastParse method

Implementation

@override
bool fastParse(State<I> state) {
  final pos = state.pos;
  final r1 = p1.fastParse(state);
  if (r1) {
    final r2 = p2.fastParse(state);
    if (r2) {
      return true;
    }
  }

  state.pos = pos;
  return false;
}