LanguageFeatures/nnbd/static_errors_A06_t23.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 mixin declaration or a class declaration with
/// no generative constructors declares an instance variable with a potentially
/// non-nullable type and no initializer expression unless the variable is marked
/// with the late modifier.
///
/// @description Check that it is an error if a class declaration with no
/// generative constructors declares an instance variable with a potentially
/// non-nullable type and no initializer expression. Test FutureOr<T>, where
/// <T extends Object>
/// @author sgrekhov@unipro.ru
/// @issue 40677
/// @issue 40940


import "dart:async";

class C<T extends Object> {
  FutureOr<T> t;
//            ^
// [analyzer] unspecified
// [cfe] unspecified
  factory C.f(T t) = D;
}

class D<T extends Object> implements C<T> {
  FutureOr<T> t;
  D(this.t);
}

main() {
  new C<String>.f("Lily was here");
}