import Foundation
let pattern = #"^P((((([0-9]+Y([0-9]+M)?([0-9]+[DW])?)|([0-9]+M([0-9]+[DW])?)|([0-9]+[DW]))(T(([0-9]+H([0-9]+M)?([0-9]+S)?)|([0-9]+M([0-9]+S)?)|([0-9]+S)))?|(T(([0-9]+H([0-9]+M)?([0-9]+S)?)|([0-9]+M([0-9]+S)?)|([0-9]+S)))))|(([0-9]{4}-(0[0-9]|1[0-2])-([0-2][0-9]|3[0-1]))T(([0-1][0-9]|2[0-3]):[0-5][0-9]:[0-5][0-9])))$"#
let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines)
let testString = #"""
P0Y1M2DT3H4M5S
P0Y1M2WT3H4M5S
P0Y1M2DT3H
P0YT3H4M5S
P0YT3H
P0Y1M2D
P0Y
"""#
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