LanguageFeatures/nnbd/static_errors_A05_t13.dart

// 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 It is an error if a class declaration declares an instance
/// variable with a potentially non-nullable type and no initializer expression,
/// and the class has a generative constructor where the variable is not
/// initialized via an initializing formal or an initializer list entry, unless
/// the variable is marked with a `late`, `abstract`, or `external` modifier.
///
/// @description Check that it is an error if a class declaration declares an
/// instance variable with a potentially non-nullable type and no initializer
/// expression, and the class has a generative constructor where the variable is
/// not initialized via an initializing formal or an initializer list entry, and
/// the variable is not marked with a `late`, `abstract` or `external` modifier.
/// Test `FutureOr<FutureOr<A>>` where `A` is some class.
/// @author sgrekhov@unipro.ru
/// @issue 40951

import "dart:async";

class A {}

class C1 {
  FutureOr<FutureOr<A>> f1;
//                      ^^
// [cfe] unspecified
  FutureOr<FutureOr<String>> f2;
//                           ^^
// [cfe] unspecified
  C1() {}
//^^
// [analyzer] unspecified
}

abstract class C2 {
  FutureOr<FutureOr<A>> f1;
//                      ^^
// [cfe] unspecified
  FutureOr<FutureOr<String>> f2;
//                           ^^
// [cfe] unspecified

  C2() {}
//^^
// [analyzer] unspecified
}

main() {
  print(C1);
  print(C2);
}