1 /* Copyright 2017 The TensorFlow Authors. All Rights Reserved. 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 http://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 TENSORFLOW_CORE_LIB_GTL_OPTIONAL_H_ 17 #define TENSORFLOW_CORE_LIB_GTL_OPTIONAL_H_ 18 19 #include "absl/types/optional.h" 20 21 namespace tensorflow { 22 namespace gtl { 23 24 // Deprecated: please use absl::optional directly. 25 using absl::make_optional; 26 using absl::nullopt; 27 template <typename T> 28 using optional = absl::optional<T>; 29 30 } // namespace gtl 31 } // namespace tensorflow 32 33 #endif // TENSORFLOW_CORE_LIB_GTL_OPTIONAL_H_ 34