// Copyright (c) 2021, 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 CONST_CANONICAL_TYPE(X extends T) = X*
///
/// @description Checks that CONST_CANONICAL_TYPE(X extends T) = T? in weak mode.
/// Please note that this test should not be executed with analyzer.
/// The exception is that some constant expressions are evaluated at compile time
/// (we don't actually promise that they are evaluated before run time, but we
/// know that some compile-time evaluation does take place); some of those
/// constant expressions have different semantics in an execution with sound and
/// unsound null checking. Hence we may be able to observe a different behavior.
/// The analyzer assumes sound null checking during constant evaluation. So, the
/// test should be skipped by analyzer.
///
/// @author iarkh@unipro.ru

// Requirements=nnbd-weak

import "../../const_evaluation_lib.dart";

class D<T> extends C<T> {
  const D(Object? o) : super(o);
}

const dynamic d = null;
Never n = throw "Should not reach here";

main() {
  const d1 = D<int>(null);
  const d2 = D<int>(d);
}