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 = #"([\p{L}\p{N}_-]+)-\d+"#
let regex = try! NSRegularExpression(pattern: pattern)
let testString = ##"""
<if VERSION-1="A1" VERSION-17="A3">
<assign CTA="blue"></assign>
<assign CTA2="green"></assign>
<assign TEXT1="Hello%3Cbr/%3EWorld"></assign>
<elseif VERSION-147="A2">
<assign CTA="red"></assign>
<assign CTA2="yellow"></assign>
<assign CTA3="brown"></assign>
<assign TEXT1="Click%20%3Ca%20href='https://example.com'%20style='text-decoration:none;color:#000000;'%3Ehere%3C/a%3E"></assign>
</if>
// condition 2
<if VERSION-409="A4" VERSION-425="A5">
<assign CTA="purple"></assign>
<assign CTA2="orange"></assign>
<assign TEXT1="Hi%20%3Cspan%20style='font-%20weight:bold;'%3EJohn%3C/span%3E"></assign>
</if>
// condition 3
<if LANG-618="en_US">
<assign TITLE="English"></assign>
</if>
"""##
let stringRange = NSRange(location: 0, length: testString.utf16.count)
let substitutionString = #"$1"#
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