import Foundation
let pattern = #"<[^<>]*>(*SKIP)(*F)|[A-Z0-9._%+-]+@([A-Z0-9.-]+\.[A-Z]{2,4}|[A-Z0-9.-]+)"#
let regex = try! NSRegularExpression(pattern: pattern, options: [.anchorsMatchLines, .caseInsensitive])
let testString = #"""
<div data="example1@dom.com,example4@dom.com"><a href="example1@dom.com" > example4@dom.com, <b>example3@dom.com</b> other text, example7@dom.com, ,<i>example5@dom.com</i></a></div >
"""#
let stringRange = NSRange(location: 0, length: testString.utf16.count)
let substitutionString = #"[---]"#
let result = regex.stringByReplacingMatches(in: testString, range: stringRange, withTemplate: substitutionString)
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