import Foundation
// WARNING: You included a flag that Swift doesn't support: u
// When this flag is set, it makes the pattern and subject strings to be treated as unicode.
// Swift already treats the pattern and subject strings as unicode by default, so including this flag is redundant.
// WARNING: You included a flag that Swift doesn't support: J
// Wehn this flag is set, it allows duplicated capturing group names.
// By default, Swift captures only the last value matched for a repeated capture group.
// As an alternative, the pattern can be modified to contain one capturing group per group you want to get in the result.
let pattern = #"""
<url>\s*
(?>
(?>
(?><lastmod>\s*(?<mod>[^<]+)\s*</lastmod>)
|
(?><changefreq>\s*(?<freq>\w+)\s*</changefreq>)
|
(?><priority>\s*(?<prio>[01](?>\.\d{1,2})?)\s*</priority>)
)\s*
){0,3}\s*
<loc>\s*
(?<uri>[^<]+)\s*
</loc>\s*
(?>
(?>
(?><lastmod>\s*(?<mod>[^<]+)\s*</lastmod>)
|
(?><changefreq>\s*(?<freq>\w+)\s*</changefreq>)
|
(?><priority>\s*(?<prio>[01](?>\.\d{1,2})?)\s*</priority>)
)\s*
){0,3}\s*
</url>
"""#
let regex = try! NSRegularExpression(pattern: pattern, options: .allowCommentsAndWhitespace)
let testString = #"""
<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
<url>
<lastmod>2005-01-01</lastmod>
<changefreq>monthly</changefreq>
<priority>0.8</priority>
<loc>http://www.example.com/</loc>
</url>
<url>
<loc>http://www.example.com/catalog?item=12&desc=vacation_hawaii</loc>
<changefreq>weekly</changefreq>
</url>
<url>
<loc>http://www.example.com/catalog?item=73&desc=vacation_new_zealand</loc>
<lastmod>2004-12-23</lastmod>
<changefreq>weekly</changefreq>
</url>
<url>
<loc>http://www.example.com/catalog?item=74&desc=vacation_newfoundland</loc>
<lastmod>2004-12-23T18:00:15+00:00</lastmod>
<priority>0.3</priority>
</url>
<url>
<loc>http://www.example.com/catalog?item=83&desc=vacation_usa</loc>
<lastmod>2004-11-23</lastmod>
</url>
</urlset>
"""#
let stringRange = NSRange(location: 0, length: testString.utf16.count)
let matches = regex.matches(in: testString, range: stringRange)
var result: [[String]] = []
for match in matches {
var groups: [String] = []
for rangeIndex in 1 ..< match.numberOfRanges {
let nsRange = match.range(at: rangeIndex)
guard !NSEqualRanges(nsRange, NSMakeRange(NSNotFound, 0)) else { continue }
let string = (testString as NSString).substring(with: nsRange)
groups.append(string)
}
if !groups.isEmpty {
result.append(groups)
}
}
print(result)
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