Swift variable name with ` (backtick)
I was browsing Alamofire sources and found variable which name is backtick escaped in this source file open static let `default`: SessionManager = { let configuration = URLSessionConfiguration.default configuration.httpAdditionalHeaders = SessionManager.defaultHTTPHeaders return SessionManager(configuration: configuration) }() However in places where variable is used there are no backticks. What's the purpose of backticks? According to the Swift documentation : To use a reserved word as an identifier, put a backtick before and after it. For example, class is not a valid identifier, but `class`