keypaths

Is there a way to create a Keypath from a String in Swift 4 to access a value in a struct by its path or variable name Finally I found out that I should use CodingKeys instead of KeyPaths to access the a value of a variable of a struct by String Thanks in advance, Michael consider you have something like this, struct foo { var test: doo } struct doo { var test: Int } //How to use it let doo = Doo(test: 10) let foo = Foo(test: doo) let mykeyPath = \Foo.test.test let result = foo[keyPath: mykeyPath] print(result) 来源： https://stackoverflow.com/questions/52427304/swift-keypath-from-string

I have an array of enum cases, where each case has a keyPath property, which returns an AnyKeyPath matching the classes property with the same name as the enum case: protocol PathAccessor: CodingKey { var keyPath: AnyKeyPath { get } static var allCases: [Self] { get } init?(rawValue: Int) } extension PathAccessor { static var allCases: [Self] { var cases: [Self] = [] var index: Int = 0 while let element = Self.init(rawValue: index) { cases.append(element) index += 1 } return cases } } class Robot { let name: String var age: Int var powered: Bool var hasItch: Bool? enum CodingKeys: Int,