// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

class A {
  const A();
}

class B extends A {
  const B();
}

class C extends A {
  const C();
  const factory C.d() = D;
}

class D extends B implements C {
  const D();
}

class Test1 {
  final A x = const A(); /// 01: ok
  final A x = const B(); /// 02: ok
  final B x = const A(); /// 03: checked mode compile-time error
  final B x = const C(); /// 04: checked mode compile-time error, static type warning
  final B x = const C.d(); /// 05: static type warning
  const Test1();
}

// Will be instantiated with U=A and V=B.
class Test2<U, V> {
  final U x = const A(); /// 06: static type warning
  final U x = const B(); /// 07: static type warning
  final V x = const A(); /// 08: checked mode compile-time error, static type warning
  final V x = const C(); /// 09: checked mode compile-time error, static type warning
  final V x = const C.d(); /// 10: static type warning
  const Test2();
}

// Will be instantiated with U=A and V=B.
class Test3<U extends A, V extends B> {
  final U x = const A(); /// 11: ok
  final U x = const B(); /// 12: static type warning
  final V x = const A(); /// 13: checked mode compile-time error
  final V x = const C(); /// 14: checked mode compile-time error, static type warning
  final V x = const C.d(); /// 15: static type warning
  const Test3();
}

// Will be instantiated with U=A and V=B.
class Test4<U extends A, V extends A> {
  final U x = const A(); /// 16: ok
  final U x = const B(); /// 17: static type warning
  final V x = const A(); /// 18: checked mode compile-time error
  final V x = const C(); /// 19: checked mode compile-time error, static type warning
  final V x = const C.d(); /// 20: static type warning
  const Test4();
}

// Will be instantiated with U=dynamic and V=dynamic.
class Test5<U extends A, V extends B> {
  final U x = const A(); /// 21: ok
  final U x = const B(); /// 22: static type warning
  final V x = const A(); /// 23: ok
  final V x = const C(); /// 24: static type warning
  final V x = const C.d(); /// 25: static type warning
  const Test5();
}

use(x) => x;

main() {
  use(const Test1());
  use(const Test2<A, B>());
  use(const Test3<A, B>());
  use(const Test4<A, B>());
  use(const Test5());
}