// 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(FutureOr<T>) = FutureOr<S>* where S is
 * CONST_CANONICAL_TYPE(T)
 *
 * @description Checks that CONST_CANONICAL_TYPE(FutureOr<int>) = FutureOr<int?>
 * in weak mode.
 * Please note that this test should not be executed with analyzer.
 * 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.
 * @Issue 45067
 * @author iarkh@unipro.ru
 */
// Requirements=nnbd-weak

import"dart:async";
import "../../const_evaluation_lib.dart";

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

main() {
  const c1 = C<FutureOr<int>>(null);
  const c2 = C<FutureOr<int>>(d);
}