import Foundation
let pattern = #"(\s*\{(?:\s*"Modulus"\s*:\s*"[a-zA-Z\d\+\/]+={0,2}"\s*(?(3)(?(4)(?(5)(?(6)(?(7)(?(8)(?(9)|,)|,)|,)|,)|,)|,)|,)()|\s*"Exponent"\s*:\s*"[a-zA-Z\d\+\/]+={0,2}"\s*(?(2)(?(4)(?(5)(?(6)(?(7)(?(8)(?(9)|,)|,)|,)|,)|,)|,)|,)()|\s*"P"\s*:\s*"[a-zA-Z\d\+\/]+={0,2}"\s*(?(2)(?(3)(?(5)(?(6)(?(7)(?(8)(?(9)|,)|,)|,)|,)|,)|,)|,)()|\s*"Q"\s*:\s*"[a-zA-Z\d\+\/]+={0,2}"\s*(?(2)(?(3)(?(4)(?(6)(?(7)(?(8)(?(9)|,)|,)|,)|,)|,)|,)|,)()|\s*"DP"\s*:\s*"[a-zA-Z\d\+\/]+={0,2}"\s*(?(2)(?(3)(?(4)(?(5)(?(7)(?(8)(?(9)|,)|,)|,)|,)|,)|,)|,)()|\s*"DQ"\s*:\s*"[a-zA-Z\d\+\/]+={0,2}"\s*(?(2)(?(3)(?(4)(?(5)(?(6)(?(8)(?(9)|,)|,)|,)|,)|,)|,)|,)()|\s*"InverseQ"\s*:\s*"[a-zA-Z\d\+\/]+={0,2}"\s*(?(2)(?(3)(?(4)(?(5)(?(6)(?(7)(?(9)|,)|,)|,)|,)|,)|,)|,)()|\s*"D"\s*:\s*"[a-zA-Z\d\+\/]+={0,2}"\s*(?(2)(?(3)(?(4)(?(5)(?(6)(?(7)(?(8)|,)|,)|,)|,)|,)|,)|,)()){8}\s*\}\s*\2\3\4\5\6\7\8\9)|(\s*\{(?:\s*"Modulus"\s*:\s*"[a-zA-Z\d\+\/]+={0,2}"\s*(?(12)|,)()|\s*"Exponent"\s*:\s*"[a-zA-Z\d\+\/]+={0,2}"\s*(?(11)|,)()){2}\s*\}\s*\11\12)"#
let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines)
let testString = #"""
{
"Modulus": "AQAB",
"Exponent": "AQAB",
"P": "AQAB",
"Q": "AQAB",
"DP": "AQAB",
"DQ": "AQAB",
"InverseQ": "AQAB",
"D": "AQAB"
}
{
"Modulus": "AQAB",
"Exponent": "AQAB"
}
(?(1)(?(2)(?(3)(?(4)(?(5)(?(6)(?(7)|,)|,)|,)|,)|,)|,)|,)
2-3-4-5-6-7-8-9
(?(3)(?(4)(?(5)(?(6)(?(7)(?(8)(?(9)|,)|,)|,)|,)|,)|,)|,)
(?(2)(?(4)(?(5)(?(6)(?(7)(?(8)(?(9)|,)|,)|,)|,)|,)|,)|,)
(?(2)(?(3)(?(5)(?(6)(?(7)(?(8)(?(9)|,)|,)|,)|,)|,)|,)|,)
(?(2)(?(3)(?(4)(?(6)(?(7)(?(8)(?(9)|,)|,)|,)|,)|,)|,)|,)
(?(2)(?(3)(?(4)(?(5)(?(7)(?(8)(?(9)|,)|,)|,)|,)|,)|,)|,)
(?(2)(?(3)(?(4)(?(5)(?(6)(?(8)(?(9)|,)|,)|,)|,)|,)|,)|,)
(?(2)(?(3)(?(4)(?(5)(?(6)(?(7)(?(9)|,)|,)|,)|,)|,)|,)|,)
(?(2)(?(3)(?(4)(?(5)(?(6)(?(7)(?(8)|,)|,)|,)|,)|,)|,)|,)
(?(DEFINE)(?P<b64>[a-zA-Z\d\+\/]+={0,2})(?P<Q1>\s*")(?P<C1>(?(22)(?(23)(?(24)(?(25)(?(26)(?(27)(?(28)|,)|,)|,)|,)|,)|,)|,))(?P<C2>(?(21)(?(23)(?(24)(?(25)(?(26)(?(27)(?(28)|,)|,)|,)|,)|,)|,)|,))(?P<C3>(?(21)(?(22)(?(24)(?(25)(?(26)(?(27)(?(28)|,)|,)|,)|,)|,)|,)|,))(?P<C4>(?(21)(?(22)(?(23)(?(25)(?(26)(?(27)(?(28)|,)|,)|,)|,)|,)|,)|,))(?P<C5>(?(21)(?(22)(?(23)(?(24)(?(26)(?(27)(?(28)|,)|,)|,)|,)|,)|,)|,))(?P<C6>(?(21)(?(22)(?(23)(?(24)(?(25)(?(27)(?(28)|,)|,)|,)|,)|,)|,)|,))(?P<C7>(?(21)(?(22)(?(23)(?(24)(?(25)(?(26)(?(28)|,)|,)|,)|,)|,)|,)|,))(?P<C8>(?(21)(?(22)(?(23)(?(24)(?(25)(?(26)(?(27)|,)|,)|,)|,)|,)|,)|,))(?P<Q2>"\s*:\s*"(?P>b64)"\s*)(?P<Modulus>(?P>Q1)Modulus(?P>Q2))(?P<Exponent>(?P>Q1)Exponent(?P>Q2))(?P<P>(?P>Q1)P(?P>Q2))(?P<Q>(?P>Q1)Q(?P>Q2))(?P<DP>(?P>Q1)DP(?P>Q2))(?P<DQ>(?P>Q1)DQ(?P>Q2))(?P<InverseQ>(?P>Q1)InverseQ(?P>Q2))(?P<D>(?P>Q1)D(?P>Q2)))(\s*{\s*)(?:(?P>Modulus)(?P>C1)()|(?P>Exponent)(?P>C2)()|(?P>P)(?P>C3)()|(?P>Q)(?P>C4)()|(?P>DP)(?P>C5)()|(?P>DQ)(?P>C6)()|(?P>InverseQ)(?P>C7)()|(?P>D)(?P>C8)()){8}\s*}
"""#
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