import Foundation
let pattern = ##"\b(?:G,C,D|A,B,C|E,C,D)|(?:[ABCDEFG](?:#|b)?)(?:\/[ABCDEFG]b)?(?:(?:(?:maj|min|sus|add|aug|dim)(?:\d{0,2}(?:#\d{1,2}|sus\d)?)?)|(?:m\d{0,2}(?:(?:maj|add|#)\d{0,2})?)|(?:-?\d{0,2}(?:\([^)]*\)|#\d{1,2})?))?"##
let regex = try! NSRegularExpression(pattern: pattern)
let testString = ##"""
<p>Intro:G,C,D D, A, Em, Eb Ebb G G,C,D</p>
A,B,C <p><br />
Verse 1:</p> <p> D A Em <br />
Yeah I've iced down a few thousand beers in my days<br />
G <br />
You put down twice as many<br /> D A Em <br />
C9 G C#/Db C# Dsus2sus4
Dmaj13#11
Bmaj13#11
A7(b5,#9)
A7#9
B-5
#sus #maj #min #aug
"""##
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