// 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 Function
/// @author sgrekhov@unipro.ru
/// @issue 40677
/// @issue 40940


void foo() {}

class C {
  Function f;
//         ^
// [analyzer] unspecified
// [cfe] unspecified
  factory C.f() = D;
}

class D implements C {
  Function f = foo;
  D();
}

main() {
  new C.f();
}