[swift-users] What are these types with regular expressions?

[Zhao Xin]

TextCheckingResult i
​s​
 NSTextCheckingResult
<https://developer.apple.com/reference/foundation/nstextcheckingresult#>。

​Zhaoxin​



On Sat, Aug 6, 2016 at 8:25 PM, 晓敏 褚 <swift-users at swift.org> wrote:

> I’m writing a program with regular expressions, and I’m finding it
> extremely hard to code with these in swift. I got a [TextCheckingResult]
> from the matching function, and there is no document on what
> TextCheckingResult is and how could I work with it. And when I try to use
> range to get a substring, I got a Range<Int>, but the substring:with:
> method requies a Range<Index>. But there is no way I could find any
> information about the type(or protocol?) Index, and passing a Int fails.
> What are they, and how can I work with them?
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