blob: b09bcea347c43bb3fe6f8215d4fa83aa7650589d [file] [log] [blame]
// Copyright (c) 2020, 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 The NORM relation defines the canonical representative of classes
/// of equivalent types...
/// This is based on the following equations:
/// Null? == Null
/// @description Checks that Null? == Null
/// @author
// Requirements=nnbd-strong
class A<X> {}
class B<X> implements A<X> {}
class C extends B<Null?> implements A<Null> {}
main() {
new C();