import Foundation
let pattern = #"^(?:[\+-]?\d{4}(?!\d{2}\b))(?:(-?)(?:(?:0[1-9]|1[0-2])(?:\1(?:[12]\d|0[1-9]|3[01]))?|W(?:[0-4]\d|5[0-2])(?:-?[1-7])?|(?:00[1-9]|0[1-9]\d|[12]\d{2}|3(?:[0-5]\d|6[1-6])))(?:[T\s](?:(?:(?:[01]\d|2[0-3])(?:(:?)[0-5]\d)?|24\:?00)(?:[\.,]\d+(?!:))?)?(?:\2[0-5]\d(?:[\.,]\d+)?)?(?:[zZ]|(?:[\+-])(?:[01]\d|2[0-3]):?(?:[0-5]\d)?)?)?)?$"#
let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines)
let testString = #"""
2021
2021-10
2021-00
2021-13
2021-10-24
2021-10-00
2021-10-32
2021-10-24T10
2021-10-24T48
2021-10-24T10:30
2021-10-24T10:95
2021-10-24T10:30:47
2021-10-24T10:30:78
2021-10-24T10:30:47.5
2021-10-24T10:30:47.333
2021-10-24T10:30:47.333333
2021-10-24T10:30:47Z
2021-10-24T10:30:78Z
2021-10-24T10:30:47.5Z
2021-10-24T10:30:47.333Z
2021-10-24T10:30:47.333333Z
2021-10-24T10:30:47-03:00
2021-10-24T10:30:78-03:00
2021-10-24T10:30:47.5-03:00
2021-10-24T10:30:47.333-03:00
2021-10-24T10:30:47.333333-03:00
"""#
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