| // RUN: %target-swift-frontend -typecheck %s | |
| extension Sequence { | |
| func sorted<T: Comparable, K: KeyPath<Element, T>>(by keyPath: K) -> Array<Element> { | |
| self.sorted { $0[keyPath:keyPath] < $1[keyPath:keyPath] } | |
| } | |
| } | |
| struct Foo { | |
| let a: Int | |
| } | |
| func main() { | |
| print([Foo(a: 2), Foo(a:1), Foo(a:4), Foo(a:3)].sorted(by: \Foo.a)) | |
| } | |
| main() |