import Foundation
let pattern = ##"""
<div\s+class="asd"> # match an opening 'div' with an id that starts with 't' and some digits
[^<>]* # match zero or more chars other than '<' and '>'
( # open group 1
<div[^>]*> # match an opening 'div'
(?: # open a non-matching group
[^<>]* # match zero or more chars other than '<' and '>'
| # OR
(?1) # recursively match what is defined by group 1
)* # close the non-matching group and repeat it zero or more times
</div> # match a closing 'div'
) # close group 1
[^<>]* # match zero or more chars other than '<' and '>'
</div>
"""##
let regex = try! NSRegularExpression(pattern: pattern, options: [.anchorsMatchLines, .caseInsensitive, .allowCommentsAndWhitespace, .dotMatchesLineSeparators])
let testString = #"""
<div>
<div class="asd">
<div>
<div>
Hello
</div>
</div>
</div>
</div>
"""#
let stringRange = NSRange(location: 0, length: testString.utf16.count)
if let firstMatch = regex.firstMatch(in: testString, range: stringRange) {
let result: [String] = (1 ..< firstMatch.numberOfRanges).map { (testString as NSString).substring(with: firstMatch.range(at: $0)) }
print(result)
} else {
print("No matches were found.")
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Swift 5.2, please visit: https://developer.apple.com/documentation/foundation/nsregularexpression