import Foundation
let pattern = #"(?:<(style)(?:\s+(?=((?:"[\S\s]*?"|'[\S\s]*?'|(?:(?!\/>)[^>])?)+))\2)?\s*>)([\S\s]*?)<\/\1\s*>"#
let regex = try! NSRegularExpression(pattern: pattern)
let testString = #"""
const str1 = '<style> div { color: red; } a { color: green; } </style>hello<div></div><div><a>hello</a></div>'
const str2 = '<style> div { color: red; } div > a { color: green; } </style>hello<div></div><div><a>hello</a></div>'
const regex = /<style[^>]*>([^>]*?)<\/style>/g
const matches1 = str1.match(regex) // returns a match
const matches2 = str2.match(regex) // does NOT return a match
"""#
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