[RegexGenerator(@"\p{C}\P{C}\p{L}\P{L}[\p{L}\d][^\p{L}\d]\p{Ll}\P{Ll}\p{Lu}\P{Lu}\p{N}\P{N}\p{P}\P{P}\p{Z}\P{Z}\p{S}\P{S}")]

if ((uint)slice.Length < 18 ||
    (char.GetUnicodeCategory(slice[0]) switch { UnicodeCategory.Control or UnicodeCategory.Format or UnicodeCategory.OtherNotAssigned or UnicodeCategory.PrivateUse or UnicodeCategory.Surrogate => false, _ => true }) || // Match a character in the set [\p{C}].
    (char.GetUnicodeCategory(slice[1]) switch { UnicodeCategory.Control or UnicodeCategory.Format or UnicodeCategory.OtherNotAssigned or UnicodeCategory.PrivateUse or UnicodeCategory.Surrogate => true, _ => false }) || // Match a character in the set [\P{C}].
    (char.GetUnicodeCategory(slice[2]) switch { UnicodeCategory.LowercaseLetter or UnicodeCategory.ModifierLetter or UnicodeCategory.OtherLetter or UnicodeCategory.TitlecaseLetter or UnicodeCategory.UppercaseLetter => false, _ => true }) || // Match a character in the set [\p{L}].
    (char.GetUnicodeCategory(slice[3]) switch { UnicodeCategory.LowercaseLetter or UnicodeCategory.ModifierLetter or UnicodeCategory.OtherLetter or UnicodeCategory.TitlecaseLetter or UnicodeCategory.UppercaseLetter => true, _ => false }) || // Match a character in the set [\P{L}].
    (char.GetUnicodeCategory(slice[4]) switch { UnicodeCategory.LowercaseLetter or UnicodeCategory.ModifierLetter or UnicodeCategory.OtherLetter or UnicodeCategory.TitlecaseLetter or UnicodeCategory.UppercaseLetter or UnicodeCategory.DecimalDigitNumber => false, _ => true }) || // Match a character in the set [\p{L}\d].
    (char.GetUnicodeCategory(slice[5]) switch { UnicodeCategory.LowercaseLetter or UnicodeCategory.ModifierLetter or UnicodeCategory.OtherLetter or UnicodeCategory.TitlecaseLetter or UnicodeCategory.UppercaseLetter or UnicodeCategory.DecimalDigitNumber => true, _ => false }) || // Match a character in the set [^\p{L}\d].
    (char.GetUnicodeCategory(slice[6]) != UnicodeCategory.LowercaseLetter) || // Match a character in the set [\p{Ll}].
    (char.GetUnicodeCategory(slice[7]) == UnicodeCategory.LowercaseLetter) || // Match a character in the set [\P{Ll}].
    (char.GetUnicodeCategory(slice[8]) != UnicodeCategory.UppercaseLetter) || // Match a character in the set [\p{Lu}].
    (char.GetUnicodeCategory(slice[9]) == UnicodeCategory.UppercaseLetter) || // Match a character in the set [\P{Lu}].
    (char.GetUnicodeCategory(slice[10]) switch { UnicodeCategory.DecimalDigitNumber or UnicodeCategory.LetterNumber or UnicodeCategory.OtherNumber => false, _ => true }) || // Match a character in the set [\p{N}].
    (char.GetUnicodeCategory(slice[11]) switch { UnicodeCategory.DecimalDigitNumber or UnicodeCategory.LetterNumber or UnicodeCategory.OtherNumber => true, _ => false }) || // Match a character in the set [\P{N}].
    (char.GetUnicodeCategory(slice[12]) switch { UnicodeCategory.ConnectorPunctuation or UnicodeCategory.DashPunctuation or UnicodeCategory.ClosePunctuation or UnicodeCategory.OtherPunctuation or UnicodeCategory.OpenPunctuation or UnicodeCategory.FinalQuotePunctuation or UnicodeCategory.InitialQuotePunctuation => false, _ => true }) || // Match a character in the set [\p{P}].
    (char.GetUnicodeCategory(slice[13]) switch { UnicodeCategory.ConnectorPunctuation or UnicodeCategory.DashPunctuation or UnicodeCategory.ClosePunctuation or UnicodeCategory.OtherPunctuation or UnicodeCategory.OpenPunctuation or UnicodeCategory.FinalQuotePunctuation or UnicodeCategory.InitialQuotePunctuation => true, _ => false }) || // Match a character in the set [\P{P}].
    (char.GetUnicodeCategory(slice[14]) switch { UnicodeCategory.LineSeparator or UnicodeCategory.ParagraphSeparator or UnicodeCategory.SpaceSeparator => false, _ => true }) || // Match a character in the set [\p{Z}].
    (char.GetUnicodeCategory(slice[15]) switch { UnicodeCategory.LineSeparator or UnicodeCategory.ParagraphSeparator or UnicodeCategory.SpaceSeparator => true, _ => false }) || // Match a character in the set [\P{Z}].
    (char.GetUnicodeCategory(slice[16]) switch { UnicodeCategory.CurrencySymbol or UnicodeCategory.ModifierSymbol or UnicodeCategory.MathSymbol or UnicodeCategory.OtherSymbol => false, _ => true }) || // Match a character in the set [\p{S}].
    (char.GetUnicodeCategory(slice[17]) switch { UnicodeCategory.CurrencySymbol or UnicodeCategory.ModifierSymbol or UnicodeCategory.MathSymbol or UnicodeCategory.OtherSymbol => true, _ => false })) // Match a character in the set [\P{S}].
{
    return false; // The input didn't match.
}

if ((uint)slice.Length < 18 ||
    !char.IsControl(slice[0]) || // Match a character in the set [\p{C}].
    char.IsControl(slice[1]) || // Match a character in the set [\P{C}].
    !char.IsLetter(slice[2]) || // Match a character in the set [\p{L}].
    char.IsLetter(slice[3]) || // Match a character in the set [\P{L}].
    !char.IsLetterOrDigit(slice[4]) || // Match a character in the set [\p{L}\d].
    char.IsLetterOrDigit(slice[5]) || // Match a character in the set [^\p{L}\d].
    !char.IsLower(slice[6]) || // Match a character in the set [\p{Ll}].
    char.IsLower(slice[7]) || // Match a character in the set [\P{Ll}].
    !char.IsUpper(slice[8]) || // Match a character in the set [\p{Lu}].
    char.IsUpper(slice[9]) || // Match a character in the set [\P{Lu}].
    !char.IsNumber(slice[10]) || // Match a character in the set [\p{N}].
    char.IsNumber(slice[11]) || // Match a character in the set [\P{N}].
    !char.IsPunctuation(slice[12]) || // Match a character in the set [\p{P}].
    char.IsPunctuation(slice[13]) || // Match a character in the set [\P{P}].
    !char.IsSeparator(slice[14]) || // Match a character in the set [\p{Z}].
    char.IsSeparator(slice[15]) || // Match a character in the set [\P{Z}].
    !char.IsSymbol(slice[16]) || // Match a character in the set [\p{S}].
    char.IsSymbol(slice[17])) // Match a character in the set [\P{S}].
{
    return false; // The input didn't match.
}