| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| #pragma once |
| |
| #define optional_CONFIG_SELECT_OPTIONAL optional_OPTIONAL_NONSTD |
| |
| #include "arrow/vendored/optional.hpp" // IWYU pragma: export |
| |
| namespace arrow { |
| namespace util { |
| |
| template <typename T> |
| using optional = nonstd::optional<T>; |
| |
| using nonstd::bad_optional_access; |
| using nonstd::make_optional; |
| using nonstd::nullopt; |
| |
| } // namespace util |
| } // namespace arrow |
