// RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -enable-experimental-keypaths -emit-silgen %s | %FileCheck %s
// REQUIRES: objc_interop

import Foundation

struct NonObjC {
  var x: Int
  var y: NSObject
}

class Foo: NSObject {
  @objc var int: Int { fatalError() }
  @objc var bar: Bar { fatalError() }
  var nonobjc: NonObjC { fatalError() }
  @objc(thisIsADifferentName) var differentName: Bar { fatalError() }

  @objc subscript(x: Int) -> Foo { return self }
  @objc subscript(x: Bar) -> Foo { return self }
}

class Bar: NSObject {
  @objc var foo: Foo { fatalError() }
}

// CHECK-LABEL: sil hidden @_T013keypaths_objc0B8KeypathsyyF
func objcKeypaths() {
  // CHECK: keypath $WritableKeyPath<NonObjC, Int>, (root
  _ = #keyPath2(NonObjC, .x)
  // CHECK: keypath $WritableKeyPath<NonObjC, NSObject>, (root
  _ = #keyPath2(NonObjC, .y)
  // CHECK: keypath $KeyPath<Foo, Int>, (objc "int"
  _ = #keyPath2(Foo, .int)
  // CHECK: keypath $KeyPath<Foo, Bar>, (objc "bar"
  _ = #keyPath2(Foo, .bar)
  // CHECK: keypath $KeyPath<Foo, Foo>, (objc "bar.foo"
  _ = #keyPath2(Foo, .bar.foo)
  // CHECK: keypath $KeyPath<Foo, Bar>, (objc "bar.foo.bar"
  _ = #keyPath2(Foo, .bar.foo.bar)
  // CHECK: keypath $KeyPath<Foo, NonObjC>, (root
  _ = #keyPath2(Foo, .nonobjc)
  // CHECK: keypath $KeyPath<Foo, NSObject>, (root
  _ = #keyPath2(Foo, .bar.foo.nonobjc.y)
  // CHECK: keypath $KeyPath<Foo, Bar>, (objc "thisIsADifferentName"
  _ = #keyPath2(Foo, .differentName)
}