// 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:
 * Super-Interface: T0 is an interface type with super-interfaces S0,...Sn
 * - and Si <: T1 for some i
 * @description Check that if type T0 is an interface type with super-interfaces
 * S0,...Sn and and Si <: T1 for some i then T0 is a subtype of a type T1
 * @author sgrekhov@unipro.ru
 */
class T1 {
  const T1();
}

abstract class S0 extends T1 {}
abstract class S1 {}
abstract class S2 {}

abstract class T0 implements S0, S1, S2  {}

class T implements T0 {}

T0 t0Instance = new T();
T1 t1Instance = new T1();

const t1Default = const T1();

//# @T0 = T0
//# @T1 = T1