LanguageFeatures/nnbd/static_errors_A02_t12.dart

// Copyright (c) 2019, 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 to read a field or tear off a method from an
 * expression whose type is potentially nullable and not dynamic, except for the
 * methods and fields on Object.
 *
 * @description  Check that it is no compile-time error to read a field or tear
 * off a method from an expression whose type is potentially nullable if they
 * are  methods, setters, getters, and operators on Object. Test that methods of
 * Object are allowed for the type <T extends F?>, where F is a function type
 * @author sgrekhov@unipro.ru
 */
// Requirements=nnbd-strong
import "../../Utils/expect.dart";

typedef void Foo();

void foo() {}
void bar() {}

class C<T extends Foo?> {
  T a;
  C(this.a);

  test() {
    Expect.isNotNull(a.toString);
  }
}

main() {
  C<Foo?> c = new C<Foo?>(foo);
  c.test();
}