LanguageFeatures/nnbd/static_errors_A06_t05.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 function type
 * @author sgrekhov@unipro.ru
 * @issue 40677
 * @issue 40940
 */

typedef void Foo();

void foo() {}

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

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

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