import Foundation
let pattern = #"""
(?<inner>(?<![\p{L}'])(?:\p{L}+')+\p{L}+(?![\p{L}']))|
(?<began>(?<!\p{L})(?:'\p{L}+)+(?![\p{L}']))|
(?<ended>(?<![\p{L}'])(?:\p{L}+')+(?!\p{L}))|
(?<outer>(?<!\p{L})'\p{L}+'(?!\p{L}))
"""#
let regex = try! NSRegularExpression(pattern: pattern, options: [.anchorsMatchLines, .caseInsensitive, .allowCommentsAndWhitespace])
let testString = #"'Twas---Wha'? Wouldn'tcha'? 'Twas, or 'twasn't, 'tis what's 'tween dawn 'n' dusk 'n stuff. Cookin'? 'Sams' place, 'yo'"#
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