import Foundation
// WARNING: You included a flag that Swift doesn't support: u
// When this flag is set, it makes the pattern and subject strings to be treated as unicode.
// Swift already treats the pattern and subject strings as unicode by default, so including this flag is redundant.
let pattern = #"""
\b
((?<CASE_UPPER>[[:upper:]]+)|
(?<CASE_INITIALCAPS>[A-Z][a-z]+[A-Z]*+)|
(?<CASE_MIXED>[A-z]*[A-Z][A-z]*+)|
(?<PHRASE>[A-Z][\w-]*(\s+[A-Z][\w-]*)+))
\b
"""#
let regex = try! NSRegularExpression(pattern: pattern, options: .allowCommentsAndWhitespace)
let testString = #"I am testing to see if this works for UPPERCASE, InitialCase and mixedCase which of course is also mIxedcase. Firstword initial case should not be matched. FirstWordMixed case should be. UPPERCASE first word should be. And of course phrases that combine any combination of UPPER mixEd Initicase should be pulled as a phrase not a word which could be of course Initcase1 Initcase2 Initcase3. Finally it needs to match all sorto of Associations such as Association of First Words, Last Word for Association, Middle Word Association for Words."#
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