import Foundation
let pattern = ##"""
^ # String start
(?=.{8,}$) # 8 or more characters other than a newline
(?:
[^A-Z\n]*[A-Z][^A-Z\n]* # a string with 1 uppercase letter only
| # or...
(?:[^A-Z\n]*[A-Z]){6} # 6 occ. of 0+ chars other than uppercase letters followed with 1 uppercase letter
.* # 0+ chars other than a newline
)
$ # string end
"""##
let regex = try! NSRegularExpression(pattern: pattern, options: [.anchorsMatchLines, .allowCommentsAndWhitespace])
let testString = #"""
AAAAAAaa
AAaaAAaaAVA
"""#
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