import Foundation
let pattern = ##"""
(?x) # set flag to allow verbose regexps
(?:[A-Z]\.)+ # abbreviations, e.g. U.S.A.
|\d+(?:\.\d+)?% # percentages, 82%
|\w+(?:[-']\w+)* # permit word-internal hyphens and apostrophes
|[-.(]+ # double hyphen, ellipsis, and open parenthesis
|\S\w* # any sequence of word characters#
|[][{}.,;"'?():_`-] # these are separate tokens
"""##
let regex = try! NSRegularExpression(pattern: pattern)
let testString = #"How I'm 15.5% wholesome-looking U.S.A. we RADAR () [] {} you -- are, ... you?"#
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