String extension to add a regex comparison operator "~="

Regex.swift

import Foundation

extension String {
    static func ~= (lhs: String, rhs: String) -> Bool {
        guard let regex = try? NSRegularExpression(pattern: rhs) else { return false }
        let range = NSRange(location: 0, length: lhs.utf16.count)
        return regex.firstMatch(in: lhs, options: [], range: range) != nil
    }
}

Credit: https://www.hackingwithswift.com/articles/108/how-to-use-regular-expressions-in-swift

Example usage, checking a(n error) string to see if it contains a HTTP status code:

extension String {
    func contains(statusCode: StatusCode) -> Bool {
        return self ~= "\\b\(statusCode.rawValue)[0-9][0-9]\\b"
    }
}

enum StatusCode: Int, CaseIterable {
    case oneHundred = 1, twoHundred, threeHundred, fourHundred, fiveHundred
}

Usage:

// Thrown error contains status code 400-499
if errorString.contains(statusCode: .fourHundred) {
    // Do something...
}