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 16 #ifndef ABSL_BASE_INTERNAL_IDENTITY_H_ 17 #define ABSL_BASE_INTERNAL_IDENTITY_H_ 18 19 #include "absl/base/config.h" 20 21 namespace absl { 22 ABSL_NAMESPACE_BEGIN 23 namespace internal { 24 25 template <typename T> 26 struct identity { 27 typedef T type; 28 }; 29 30 template <typename T> 31 using identity_t = typename identity<T>::type; 32 33 } // namespace internal 34 ABSL_NAMESPACE_END 35 } // namespace absl 36 37 #endif // ABSL_BASE_INTERNAL_IDENTITY_H_ 38