// Copyright (c) 2018, 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.

/// @assertion We say that a type T0 is a subtype of a type T1 (written T0 <: T1)
/// when:
/// Interface Compositionality: T0 is an interface type
/// C0<S0, ..., Sk> and T1 is C0<U0, ..., Uk> and each Si <: Ui
/// @description Check that if type T0 is an interface type
/// C0<S0, ..., Sk> and T1 is C0<U0, ..., Uk> and each Si <: Ui then T0 is a
/// subtype of T1
/// @author sgrekhov@unipro.ru

abstract class U0 {}
abstract class U1 {}
abstract class U2 {}

abstract class S0 extends U0 {}
abstract class S1 extends U1 {}
abstract class S2 extends U2 {}

class C0<X, Y, Z> {
  const C0();
}

C0<S0, S1, S2> t0Instance = new C0<S0, S1, S2>();
C0<U0, U1, U2> t1Instance = new C0<U0, U1, U2>();

const t1Default = const C0<U0, U1, U2>();

//# @T0 = C0<S0, S1, S2>
//# @T1 = C0<U0, U1, U2>