LanguageFeatures/nnbd/type-aliases/static_errors_A01_t05.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 call a method, setter, getter or operator on
 * an expression whose type is potentially nullable and not dynamic, except for
 * the methods, setters, getters, and operators on Object.
 *
 * @description Check that it is no compile-time error to call a method, setter,
 * getter or operator on an expression whose type is potentially nullable if
 * they are  methods, setters, getters, and operators on Object. Test type
 * aliases
 * @author sgrekhov@unipro.ru
 */
// SharedOptions=--enable-experiment=nonfunction-type-aliases
// Requirements=nnbd-strong
import "../../../Utils/expect.dart";

class A {
}

typedef AAlias = A?;

main() {
  AAlias x = A();
  Expect.isNotNull(x.hashCode);
  Expect.isNotNull(x.toString());
  Expect.isNotNull(x.runtimeType);
  Expect.isFalse(x == A());
}