LanguageFeatures/Subtyping/static/tests/left_bottom_A01_t04.dart

// 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:
/// Left Bottom: if T0 is Never then T0 <: T1
/// @description Check that if type T0 is Never then T0 is a subtype of T1
/// @author sgrekhov@unipro.ru

import "../../../../Utils/expect.dart";
class T1 {}

class C<X extends T1> {}
void foo<X extends T1>() {}

typedef Neverland = Never;

main() {
  Expect.isTrue(C<Neverland>() is C<Never>);
  Expect.runtimeIsType<C<Never>>(C<Neverland>());
  void x2 = foo<Neverland>();
}