identity.h 1012 B

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  1. // Copyright 2017 The Abseil Authors.
  2. //
  3. // Licensed under the Apache License, Version 2.0 (the "License");
  4. // you may not use this file except in compliance with the License.
  5. // You may obtain a copy of the License at
  6. //
  7. // https://www.apache.org/licenses/LICENSE-2.0
  8. //
  9. // Unless required by applicable law or agreed to in writing, software
  10. // distributed under the License is distributed on an "AS IS" BASIS,
  11. // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12. // See the License for the specific language governing permissions and
  13. // limitations under the License.
  14. //
  15. #ifndef ABSL_BASE_INTERNAL_IDENTITY_H_
  16. #define ABSL_BASE_INTERNAL_IDENTITY_H_
  17. #include "absl/base/config.h"
  18. namespace absl {
  19. ABSL_NAMESPACE_BEGIN
  20. namespace internal {
  21. template <typename T>
  22. struct identity {
  23. typedef T type;
  24. };
  25. template <typename T>
  26. using identity_t = typename identity<T>::type;
  27. } // namespace internal
  28. ABSL_NAMESPACE_END
  29. } // namespace absl
  30. #endif // ABSL_BASE_INTERNAL_IDENTITY_H_