koher

struct Foo { var a: Int = 42 } struct Bar { var foo: Foo = Foo() } let k1: KeyPath<Bar, Foo> = \.foo let k2: PartialKeyPath<Foo> = \.a // let k: PartialKeyPath<Bar> = k1.appending(path: k2) let bar = Bar() // let a: Int = bar[keyPath: k1][keyPath: k2] let a: Any = bar[keyPath: k1][keyPath: k2] print(a) // OK: 42

Version:

swift-4.1.1-RELEASE

Output:

42

Error: