import Foundation
let pattern = #"(?<Major>[a-zA-Z0-9]+)(?:\.([a-zA-Z0-9]+))+(?<Label>(?:(?:\-|\+)?\w+)+)?"#
let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines)
let testString = #"""
5.6.20.4-dev+a2c4ok ok
1.3.2
12.0.2.1000 ok
3.60.2.300 ok
0.0.2.1-dev ok
2.0.3.1dev ok
this is v1.2.3.1 ok
1.2.3
30.0000.1.222.3333
Not Match
1
1.
12
12.
123
123.
"""#
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