Swift 4.2 compiler error in String+CreditCardRow

[mrhaxic]

To avoid the compiler error of subscript Range we have to use the following

        let start = index(startIndex, offsetBy: r.lowerBound)
        let end = index(start, offsetBy: r.upperBound - r.lowerBound)
        let range: Range<Index> = start..<end
        return String(self[range])
    }

Thanks.

[elgartoinf]

Regards!
change the code for this and the problem is solved

subscript (r: Range<Int>) -> String {
        let start = self.index(startIndex, offsetBy: r.lowerBound)
        let end = self.index(start, offsetBy: r.upperBound - r.lowerBound)
        return String(self[start..<end])
 }

[palaryan]

Thank you! This was exactly the issue I was having.