import Foundation
let pattern = #"""
\b(?P<date>
(?P<day>
(?:(?:0[1-9]|[12]\d|30)(?=[- :\.\/](?:04|06|09|11)))|
(?:(?:0[1-9]|[12]\d|3[01])(?=[- :\.\/](?:01|03|05|07|08|10|12)))|
(?:(?:0[1-9]|[12]\d)(?=[- :\.\/]02[- :\.\/]\d\d(?:([02468][048])|([13579][26])))
(?![- :\.\/]02[- :\.\/](?:([2468][1235679])|([13579][01345789])00)))|
(?:(?:0[1-9]|1\d|2[0-8])(?=[- :\.\/]02[- :\.\/]))
)[- :\.\/]
(?P<month>0[1-9]|1[012])[- :\.\/]
(?P<year>[1-9]\d{3})
)\b
"""#
let regex = try! NSRegularExpression(pattern: pattern, options: [.anchorsMatchLines, .allowCommentsAndWhitespace])
let testString = #""#
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