private CrontabField(CrontabFieldImpl impl, string expression)
{
_impl = impl ??
throw new ArgumentNullException(nameof(impl));
_bits = new BitArray(impl.ValueCount);
_bits.SetAll(false);
_minValueSet = int.MaxValue;
_maxValueSet = -1;
_impl.Parse(expression, Accumulate);
}
/// <summary>
/// Parses a crontab field expression given its kind.
/// </summary>
public static CrontabField Parse(CrontabFieldKind kind, string expression)
{
return(new CrontabField(CrontabFieldImpl.FromKind(kind), expression));
}