observer_list_unittest.nc 1.3 KB

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  1. // Copyright 2018 The Chromium Authors. All rights reserved.
  2. // Use of this source code is governed by a BSD-style license that can be
  3. // found in the LICENSE file.
  4. // This is a "No Compile Test" suite.
  5. // http://dev.chromium.org/developers/testing/no-compile-tests
  6. #include <type_traits>
  7. #include "base/observer_list.h"
  8. namespace base {
  9. #if defined(NCTEST_CHECKED_OBSERVER_USING_UNCHECKED_LIST) // [r"fatal error: static assertion failed due to requirement '!std::is_base_of<base::CheckedObserver, Observer>::value': CheckedObserver classes must not use ObserverList<T>::Unchecked."]
  10. void WontCompile() {
  11. struct Observer : public CheckedObserver {
  12. void OnObserve() {}
  13. };
  14. ObserverList<Observer>::Unchecked list;
  15. for (auto& observer: list)
  16. observer.OnObserve();
  17. }
  18. #elif defined(NCTEST_UNCHECKED_OBSERVER_USING_CHECKED_LIST) // [r"fatal error: static assertion failed due to requirement 'std::is_base_of<base::CheckedObserver, UncheckedObserver>::value': Observers should inherit from base::CheckedObserver. Use ObserverList<T>::Unchecked to observe with raw pointers."]
  19. void WontCompile() {
  20. struct UncheckedObserver {
  21. void OnObserve() {}
  22. };
  23. ObserverList<UncheckedObserver> list;
  24. for (auto& observer: list)
  25. observer.OnObserve();
  26. }
  27. #endif
  28. } // namespace base